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Mac Pro 2006 Mountain Lion

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Community member Julius Chan has sent us this handy guide to getting a 2006 Mac Pro to run the lastest Mac OS X Yosemite.

  • How can I upgrade or 'hack' an incompatible Intel Mac to run OS X 10.8 'Mountain Lion'? Is it even possible? As noted elsewhere within EveryMac.com's Mountain Lion Q&A, Mountain Lion entirely drops support for many 'older' Macs, some of which were sold as new only a little over three years ago.
  • If you get a Mac that didn't come with OS X Mountain Lion preinstalled. If you have a catastrophic hard-drive crash that requires you to initialize (format) or replace your boot drive. If you buy an external hard drive and want it to be capable of being your Mac's startup disk (that is, a bootable disk).
  • Mac OS X Mountain Lion 10.8.5 Free Download DMG. If you search on the internet a Mac OS X Mountain Lion 10.8.5 DMG Files So, you come to the right place now a day shares with you a Mac OS Powerfull operating system latest upgraded Mountain Lion 10.8.5 developed by Apple Inc. In This Version, MAC OS X Mountain Lion 10.8.5 added an exciting new feature to more improve the work and enjoy or also.

Here is his helpful guide.

Disclaimer

Macs That Can't Run Mountain Lion or Lion. If you have an iMac, MacBook, MacBook Pro, or Mac mini model that was originally released in Early/Mid 2006, the latest version of Mac OS X your system supports is Snow Leopard. However, the 2006 Mac Pro will only boot with Mac OS X 10.8 Mountain Lion or newer. Earlier versions will only boot with 32 GB of less. See Install 64 GB of RAM in Your Mac Pro 1,1 or 2,1.

First of all, all of the below are regarded as hacks. If you end up with bricked Mac Pro, then it's your own silly fault. None of this stuff is qualified. You're building what I refer to as a 'Frankenmac'.

History

Part of my day job is building Pro Tools rigs for high-end customers. They can afford the best, so I get to tinker with the latest Avid qualified hardware and software available: 'iAshtray' Mac Pros, tank-like rack mounted Sonnet chassis, HDX or HD Native cards etc. All fully qualified, just the way I like it.

This is all jolly nice for my clients, but my own personal 2006 Mac Pro 1,1 with a Cinema display (purchased from a friend for a pittance) sits there languishing quite a few operating systems behind on OSX Lion 10.7.5 running Pro Tools 10.3.10 HD. Bugger…

I'd read that some very clever folk had managed to persuade an old Mac Pro to run Mountain Lion and then Mavericks, and searching the Interwebs, I did indeed find a number of solutions that seemed to require entering a lot of commands in Terminal, creating boot partitions and generally patting your head and chewing gum at the same time. So I decided to wait a wee while until I found a more elegant solution. The wait seems to have been worth it, as I now have my poor old machine running on OSX Yosemite 10.10.2 and Pro Tools 11.3.1

The main restriction for a 2006/7 Mac Pro is that it was designed to boot into a 32-bit environment, even though a lot of the internal hardware was 64-bit capable. The clever bunnies out there in the Wild World Webby, have managed to fool a Ye Olde Mac Pro to run in 64 bit EFI.

Things that you will need:

  1. A Mac Pro 1,1 or 2,1 Cheese grater desktop with OSX Lion 10.7.5 system drive
  2. 8GB USB drive
  3. A graphics card better than a GT120, I used a Radeon HD 5770, original mac version with its appropriate power cable. There are flashed PC cards out there, but they won't display a boot screen. I like a boot screen, so I purchased a proper Apple card (2nd hand)
  4. We are sorry but the pre patched version of OSX Yosemite 10.10 is no longer available. It would appear that Apple have asked for it to be taken down.
  5. Either boot.efi file downloadable here. Black is a white Apple on a black background and Grey is the traditional Apple boot screen:
  6. Black: Sorry no longer available
  7. Grey: Sorry no longer available
  8. I chose the black screen as I dual boot into OSX Lion 10.8.5 or Yosemite 10.10.2. The black screen tells me instantly that I'm booting into Yosemite.
  9. A spare hard drive, mechanical or SSD for the new system drive. You could partition your old Lion drive, but I prefer to build on drive that's minty fresh. If I stuff anything up, I can always boot back to my untouched Lion system drive. Contingency plan…
  10. A download of Yosemite 10.10.1 or 10.10.2 Combo updaters http://support.apple.com/kb/dl1786?locale=en_US
  11. A download of Diskmaker X http://liondiskmaker.com/

All of the above cost me around $200 US, I had a spare 1TB 7200 rpm SATA drive, USB drives are cheap and seem to breed like rabbits. They also seem to disappear down the black hole that guitar picks, iLok 2 lids and single socks end up.

Preparation

Like microsoft word for mac. I'm going to assume that you're booting from your old Lion system drive, so go ahead and download all the bits and bobs from the links above. Depending on your internet speed, this may take some time, so make a nice pot of tea. If you're in Australia, as I am, you have plenty of time to make a nice batch of scones with jam and cream, thanks to our advanced network infrastructure.

Once you've finished downloading, place the files somewhere safe, it could be on a USB drive etc

I popped the files on one of my media drives temporarily so I could access them from my old system drive or my new system drive. (yet to be created, mwahhahaha)

Hardware Installation

Open up your Mac Pro, take the nasty GT120 graphics card out and pop in the ATI Radeon 5770. This card takes its power from the motherboard, so make sure you've got the correct power cable.

https://www.youtube.com/watch?v=NUh0uvUHn68

Install your new system drive, but leave the Lion drive in for the moment. I usually put new, unformatted drives in bay 4… Just so I know…

Reboot your rig into OSX Lion and make sure the new graphics card is AOK. You could format your new system drive at this stage as well. Call it something like 'Yosemite HD' or 'Kevin' if you wish.

Double and triple check that you're formatting the correct drive… (Doh) Bay 4, remember??

Software Installation

Open up Lion Diskmaker X and follow the instructions to create a bootable USB 'special' Yosemite installer from the big Yosemite image you download before. This is the patched version of Yosemite.

Quickbooks pro 2016 v17 0 2 r3 download free. Don't install the Apple App store version as this does not have ze patch…

This can take some time, so be patient and do something useful for the planet, like knitting a vest for our wee penguins on Phillip Island.

  • Install Yosemite from USB drive to your new 'Yosemite HD' system drive. Bay 4, remember?? Hold down the Mac option key to choose your boot drive after start up chime.
  • Install the boot.efi patch, I used the black version. Restart the mac, hold down the mac option key to choose your boot drive after start up chime You should now be able to boot into either OSX Lion or Yosemite 10.10 flat. Woo Hoo!
  • Install either OSX 10.10.1 or 10.10.2 Combo updater

You're done. Minecraft 1 3 5 download. I then optimise OSX Yosemite for Pro Tools, turning off mission control, notifications, silly kitten desktop pictures etc.

More Hardware Options

Mac

This not a job for the faint-hearted, but it's still pretty easy to do if you like to get your hands dirty.

I replaced the old processors (dual cores) with SLAED Xeon 5355's. EBay again, cost $80 US each.

This mod doubles the amount of processor cores giving a significant speed bump.

Inetbet casino no deposit bonus. Videos here:

Conclusion

I now have the choice to boot into OSX Lion 10.7.5 with PT10.3.10 HD OR boot into OSX Yosemite 10.10.2 with PT11.3.1. As an added bonus, my processor cores have gone from 4 to 8 at 3GHz.The new graphics card no longer struggles like the old GT120 did.

Both the software and hardware changes, including the processor upgrades were done comfortably in an afternoon. Download times were about 7 days with our advanced Australian Internet speeds.

The main reason why I wanted PT11.x running was for the video engine and faster than real-time bounce as I have recently completed a filum project that required a whole bunch of stems.

I used PT10HD for the editing and mixing, then bumped over to PT11.3.1 for stem creation.

Next thing to do for the ye olde Mac is to find some more RAM and change the Yosemite system drive to an SSD. It seems that I should be able to get quite a few more years of life from a machine that officially could not run a 64 bit OS or applications. For a machine from 2006, this is pretty cool and I've managed to spend under $400 US to achieve it.

Thanks

Don't forget to offer up some shekels for the shareware products.

Hello,
I apologize for the inflamatory title but I figured the problem I have is real and Apple engineers are more likely to notice the issue with this title. My apologies if you already noticed my other post.
My Mac Pro 2006 (first Intel model - dual Xeon 2.66GHZ 8GB) was running fine under 10.6.7 and 10.6.8.
On the first reboot after the Lion install starts I get the boot screen with the Apple logo and the spinning wheel. After a while the spinning stops. The screen stays this way. Disk IO continues for a little longer but then stops (mostly). I can ping the machine (DHCP server providing a fixed IP address for the Mac PROs MAC Address) so I know it is somewhat functional. On another Mac the Lion install went fine. On that Mac the first thing that happens after the spinning wheel stops is the screen goes into GUI mode. So I surmise my problem has something to do with graphics.
When I power cycle and boot with verbose mode I notices a few items of interest:
1) 64 bit kernel (I thought Apple only supports a 32 bit kernel on this vintage of machine)
2) A couple of unrecognized device line items. (I took out a Sonnet expansion Firewire/USB PCIe card and one of the messages went away on a subsequent try.)
3) The last message I see says something about macosx_swapon (or something close to that). After that no more screen messages even though disk IO continues.
I rebooted the machine with an external firewire drive running Snow Leopard. Everything worked fine. I went into system profiler and retrieved the info on the video card.
NVidia GeForce 8800 GT
Vendor: 0xde
Device ID: 0x0600
Revision ID: 0x00a2
Rom Revision: 3233
While the Lion specs do not call out specific supported video cards/chipsets, they do mention this card is supported for openCL under Lion so it sounds like the card is supported.
What I request is a patched Lion installer kit. I can run this from said external drive after copying the patched installer from my functional Mac. I'd also strongly suggest the installer thoroughly interrogate the hardware to determine if there are any incompatibilities before the installer triggers the reboot.
Is there a way I can determine more diagnostic information to subsequently post in this discussion? Maybe there is a command I can issue in single user mode?
Thanks in advance!

Mac Pro 2006 Mountain Lion Tamer

Seems I'm not the only one having this issue. I installed a GeForce 8800GT in my 2006 MacPro 1,1 (2 x 2.00Ghz Xeon Dual Core) that I got off eBay recently and I've also had the same issues (freezes on Apple screen, spinning logo). I actually installed Lion before I put the card in (old card GeForce 7300GT, came with the system) and it worked OK. But when I put in the card, the problems started.
But I did get an eBay message from the seller who sold me the card, and it turns out at this stage that the Lion drivers have a problem for some reason for 8800GT.
Here's the info from the system profiler if this helps:
NVIDIA GeForce 8800 GT
Vendor: NVIDIA (0x10de)
Device ID: 0x0611
Revision ID: 0x00a2
ROM Revision: 3233
Seems to be a widespread issue at the moment.

Similar Messages

2006 Mac Pro

  • Im running Lion, but Mountain Lion is not compatible with Mac Pro 2006 model(the first one).

    No, because the reason you cannot use Mountain Lion is of a hardware nature.
    There are some who claim they have successfully booted Mountain Lion on a Mac Pro 1,1. See this article.

  • Hi,
    Just started the install on my Early 2008 Mac Pro and it's completely crashed the system. The app downloaded fine and ran OK in 10.7 doing the setup and then tried to reboot. As soon as it rebooted I get a Kernel Panic and the 'Please Power Off your System'.
    I've managed to get into Recovery Mode and am going to restore from Time Machine and try again but has anyone else had this?
    There were no warnings or errors before the kernel panic at all..
    Thanks,

    This worked for me.
    Restart
    During restart, hold Ctrl + Command + P + R to reset the PRAM
    After this, the computer will flash and reboot again and should boot into the Mountain Lion Installer.
    Good luck.

  • I'm hoping sombody can help. My MAC Pro 2006 model just died. completly dead I believe it to be teh PSU but need to test if with a multi meter.
    Does anybody know which pinouts need to be jumpered first from teh J1, J2, J3 and J4 plugs?
    As all wires are black and no info on the web I'm at a loss without just buying new bliend.
    Thanks in advance

    They work off a fixed price list, not time&materials. So call or visit them and ask.
    Best html editor for mac 2019. Have a defibrillator nearby.

  • I have mac pro 2007 model given to me, I updated it to lion about six months ago, and I do not have a time machine.
    Lion stopped loading before I get to the login screen,
    I tried all the tips, doing a option/shift/v. I noticed several fsk_dsk errors that it could not fix on my boot drive.
    Restore would not work either. The only physical copy I have is the install disk that came with the mac. I think it is Tiger.
    If I put this operating system on will I be abel to upgrade it to lion, and if so will I have to pay again?

    The Lion Recovery Partition has its own index. Your Macintosh HD partition is the one with the troubles.
    If Disk Utility cannot fix it, you may need to apply different Utilities, such as Disk Warrior.
    Some readers suggest that the best disk repair is to erase the drive and restore it from your Backups.
    This might be a good time to consider getting a new drive to have on hand. This would allow you flexibility in copying, fixing, and (if needed) replacing the drive with the problems.

  • hi,
    under 10.6.8 everything worked fine. All adapters and peripherals were functional.
    After a normal looking lion install my mac pro 2006 will not make it past the boot screen (Grey Apple logo with spinning wheel). After a while the spinning wheel stopped spinning but I hear disk I/O continue for some time. A verbose boot lists the usual output. The last line visible has a mention of macos_swapon or something like that. I do note the first couple of lines specify a 64 bit kernel is booting. I was under the impression that this machine cannot run the 64 bit kernel from snow leopard discussions.
    The video card is an upgraded one (i.e. not the stock card that came with the machine). However as I said before it was working fine under snow leopard.
    Any ideas?

    I have the same problem. I did a clean install of Lion and created a temp account. I was able to use Lion for a bit, then I used the Migration Assistant to bring my regular accounts back in from an external drive. When that completed I logged off of the temp account and into my main account (without restarting). Still no problems, Lion was working fine. I shut the Macbook down for the night. Now that I'm powering it on the next morning, I only get the Apple logo and spinning wheel.
    I tried a PRAM zap, but it didn't help.

  • I have an older Mac Pro (2006). I want to install Boot Camp and Windows. I have installed a boxed Snow Leapord on the machine. And it says the download of the Boot camp drivers cannot continue because they are not available. But at that point I have not inserted a windows disk, so how does it know i have XP?
    So it appears I am limited to Windows 7? And where are the Windows 7/Boot Camp Drivers? On the OS disk?
    Finally, since I have necer considered Windows 7 before, I assume there are no compatability issues with mainstream applications that were running in XP?
    Whatsapp mobile software download. Thank you.

    You're welcome
    Just remember to reformat the partition (bootcamp partition) to NTFS with the windows installer, ensure to pick the correct partition.

  • I can't install Mountain Lion again on my Mac Pro: got this message: This copy of the Install OS X Mountain Lion application can't be verified. It may have been corrupted or tampered with during downloading. Delete this copy of the application, and go to apple store .

    Well, the hard disk has been replaced and the Apple people replaced but innstalled the older OS (
    X Lion 10.7)! So I tried to reinstall the newer OS which from App Store under Purchases but I had the problem I stated earlier: This copy of the Install OS X Mountain Lion application can't be verified. It may have been corrupted or tampered with during downloading. Delete this copy of the application, and go to apple store . Hopefully, I can get this fixed! thanks!

  • I just got a new (2012) MacPro that I can connect wirelessly to my network. I'm moving the old Mac Pro (2006) running OS 10.7.5 that had been connect via ethernet cable to the other end of the house. What do I need to get to connect it wirelessly?
    Thanks,
    Carmen

    Carmen,
    Since the Wireless card was optional back then, you may not have gotten it in your original config?
    You can verify if the hardware is installed several places, as Bob mentioned, do you have the option to enable wireless under your System Prefs Network (I would imagine not, since your asking). However, while very unlikely, it may be installed but your not able to see/select it for some reason?
    So, just to make sure, you can also verify via looking under 'System Information' (you'll want some info from there anyway).
    'Apple Menu : About This Mac : More Info : System Report : Network : (look for Wi-Fi etc.)' if it exist you'll see the card and info about it.
    If you don't have the option nor see a card was installed you can go about this a few ways.
    1. The absolute easiest route (to NOT have to deal with 3rd party drivers or possible 3rd party issues when you upgrade your OS etc) is check out places like Macsales and see if they have any of the original Air Port extreme cards available and install yourself. - http://eshop.macsales.com/item/Apple/BCM94322MC/
    2. You could talk with Macsales and ask which external USB wireless card works best with your rig (least fussy) and go that route. While several brands work just fine, you just never know when something changes in an update and then your faced with the old pointing fingers thing. Rare, but still.
    Also, while your in the System Information area you'll want to note your model, if it's 2006, I think that's Mac Pro 1,1 ?
    Hope that helps.

  • Hi all,
    I'm trying to install Mavericks on Mac Pro series 4,1 After downloading from App Store, when computer restarts I get grey screen with the 'no entry' sign. I have checked compatibility and this model qualifies for Mavericks. Tried a clean install of 10.6.8 first, but no luck. Any ideas?
    The Mac has single quad core 2.66, 6 Gb RAM, NVIDIA GeForce GT120 graphics. Four hard drives. Three Pro Tools HD cards in PCIe slots.
    I also tried this with Mountain Lion, with the same results.

    Didn't have any luck with removing PCI cards, BUT.... here's how I resolved the issue:
    I tried making a USB stick installer. That also failed, but I noticed it couldn't find any hard drives.
    I did a search about OSX installer not finding drives and found someone who had that issue and it turned out to be a conflict with the WIFI card (Atheros, not the more common Broadcom)
    I checked my System Profiler and sure enough, I have the Atheros.
    I just removed the WIFI card and booted into OSX Installer (it was still there after the failed install) and successfully installed Mavericks.

  • Just got my first intel mac! Not the newest thing but it will do. I just have a quick question, can I use the Nvidia gt640 2gb with a Mac pro 2006 with no flashing of the system or the card. Thank's. -Edward

    First, you need to look at what OS version you have. Mnay people (myself included) running some of the newer OS version are using Nvidia cards not released for the Mac. OS X Mavericks for example will support these cards, but you lose some functionaility (boot screen, etc.) Once the machine is up and running they work fine.
    With a 2006 model you are before the 3.1 machines and therefore limited in the OSX version you can run. I think you need at least 10.7 Lion.
    So if you can run 10.7 the answer is probably, but then you will lose some basic functionality. For many this is not important.

  • My stock Mac Pro 2006 just started showing the Kernel Panic screen at start-up. First saw the Kernel Panic this afternoon after leaving the system for less than an hour with a game running (EV Nova in a Pause screen). A reboot brought the system back up for a while, I was running Safari for maybe 10-15 minutes when the Kernel Panic screen showed up again.
    Tried the three stock Apple-recommended reboot options, reboot with X key down, reboot with Opt key down and PRAM reset and reboot. No luck; the Panic Kernel screen came on after each one. Also tried the original OS X 10.4 install disk during and Opt key reboot; same Kernel Panic.
    And 10.5 and 10.6 universal upgrade disks; the 10.6 disk got to the grey screen with the Apple logo and the spinning activity symbol which stopped after a while, the Apple logo went away and no further screen activity; the 10.5 disk actually got to a light blue screen with a cursor, but no other icons, the cursor did change to a text I-bar at certain areas in the center of the screen and the disk drive would spin up after some mouse or keyboard activity, no screen activity and no further progress.
    The boot drive appears to be accessible as the OS on it shows up during the Opt key start-up. I also reset the PRAM several times, so do not think that is the problem. Could the battery need replacing or possibly I have a RAM module just go bad on me?
    Suggestions? Thanks in advance.
    Dave

    Update: I have switched out every RAM module (4 X 512 MB) in turn and switched the two riser cards in every combination of one pair of RAM in the top riser card. After each reboot, the kernel panic screen comes back. Could one bad riser card, even if unpopulated and on the bottom cause the kernel panic? Any way to test my system more without swapping parts other than the RAM in and out?

  • Hey guys,
    I've done a lot of research the past couple days and I think I got a decent amount of knowledge but before I purchase I wanted to ask your opinions.
    I have a Mac Pro 2006 with the original hard drives in it and I'm looking to speed it up. I see SSDs are now a lot more affordable so I gotta take advantage.
    I use my computer for making music and recording but I do hip hop music, not live music or bands so I don't have to record a lot of tracks at once I just want to speed things up. Plus help my software move a little faster when I make beats.
    I'm looking to get a SSD as my boot drive and I want around 250gb to be safe so I narrowed it down to these three:
    Intel 730
    http://www.amazon.com/Intel-SERIES-2-5-Inch-Internal-SSDSC2BP240G4R5/dp/B00IF4NG EU/ref=lh_ni_t?ie=UTF8&psc=1&smid=A2Y5691XAL3WET
    Crucial MX100
    http://www.amazon.com/gp/product/B00KFAGCWK/ref=ox_sc_act_title_2?ie=UTF8&psc=1& smid=ATVPDKIKX0DER
    Samsung 840 EVO
    http://www.amazon.com/gp/product/B00E3W1726/ref=gno_cart_title_4?ie=UTF8&psc=1&s mid=A19W1SYPKVVBJO
    I read that there are better/faster SSDs out there but can my old 2006 Mac Pro even make use of better/faster drives speed? Are any of the 3 I've picked reliable enough to feel comfortable purchasing?
    I still don't understand what TRIM is exactly, can someone help me with that? I'm gonna go look it up now but just wondered about that specifically with these 3 drives.
    I'm also going with a Western Digital Caviar Black 2TB drive for the data. Is that overkill for my 2006 machine? Will I even notice a difference in speed with this Caviar Black as opposed to maybe the Blue or Green drive?
    I appreciate the time guys! Thanks so much I'm excited to get my Mac Pro moving like my MacBook Pro with its 300gb SSD

    An SSD is probably the best bang-4-buck improvement in performance, and today's are far better than 4 years ago (and avoid all the pitfalls of the early SATA III models).
    The larger the SSD, the more 'pipes' or channels, and you want to aim for 50% free, you need TRIM to be enabled, and yes you will notice.
    Then you want to clone the SSD and have a system restore image that you can boot from and to run Disk Utility repair so that 'trimming' is performed.
    Sometimes you want to research when you buy one and get it delivered and check to see if there are firmware update for it for your Mac.
    I could never go back and be satisfied with even a 10K drive though that can come close - almost - but with a lot of chatter noise.
    The 2TB drive will do well. Now make sure to backup, use TimeMachine, and invest in drives and software to clone those. You could use 2-3TB WD Green for those depending on how much data and full that 2TB will be.

  • My Mac Pro (2006) has suddenly stopped sending signal to the display monitor. It coincided with plugging in an Epson printer via usb - while the system was running. Pretty dumb maybe? Could I have damaged the video card? Anyone ideas? Thanks

    Howdy Le Batch,
    I was looking into the issue you are seeing here, and came across a helpful article for this specific situation. It's named Apple computers: Troubleshooting issues with video on internal or external displays and can be found here:
    When using an external display be sure to check the following:
    If you're using an Apple notebook, confirm the AC power cable or adapter is securely connected to the computer and the cable providing power to the display is also secure. It is always good to have your notebook connected to AC power when an external display is in use.
    Confirm display adapters are fully seated in their respective connections and that they are supported models and for the computer and display. Refer to these articles to assist you with adapter compatibility and further configuration information:
    Monitor and Display Adapter Table
    About Mini DisplayPort to HDMI adapters
    Apple Mini DisplayPort adapters: Frequently asked questions (FAQ)
    Thunderbolt ports and displays: Frequently asked questions (FAQ)
    Remove all display cable extenders, KVM switches, or other like devices and retest to determine if the issue is resolved.
    If more than one video adapter is in use—or 'daisy-chained'—troubleshoot by using only one adapter.
    Example: A mini DisplayPort to DVI adapter connected to a DVI to HDMI adapter is an unsupported configuration because there is a series of adapters in use.
    If available, try using a different display and or adapter (or use a different connector by using DVI instead of VGA, for instance).
    Reset the system
    You can reset the Mac's parameter RAM and SMC.Reset the resolutionStart by resetting the Mac's parameter RAM. If the display does not come up, was previously set to an unsupported resolution, and still results in no video:
    Start up in Safe Mode.
    From the Apple () menu, choose System Preferences.
    Choose Displays from the View menu to open the preferences pane.
    Select any resolution and refresh rate that your display supports.
    Restart your computer.
    Regards,
    Sterling

  • I asked in an earlier post but may not have been clear. Basically, if I upgrade to a new mac pro 2010 quad core 2.8 GHz (12GB ram) will it give me a huge improvement from a mac pro 2006 2.0GHz (with 5GB Ram) and thus reduce the need to render and the time it takes to render? My thoughts are that it will because the graphics card is much more powerful and has more memory and hence any FXplug effects will have better RT playback. Is this a correct assumption?
    Or is this too difficult to quantify. Is it simply 'You will see an improvement but.'
    I mainly edit 1080 25p Pro Res.
    Thanks

    Further test has astounded me. I installed my copy of Premiere Pro CS4 on the core i3 iMac. I don't use it on my Mac Pro. I only bought it for Encore CS4 (I had an old copy of Premiere from Windows that I used to upgrade).
    I copied an avchd card to the iMac desktop. I opened the media in Premiere Pro cs4 and played it back at Highest Quality: it was smooth as butter even with transitions. There were 47 minutes of footage that I added to the timeline and exported out as AIC 1080 50i. This took 2 hours 20 minutes!
    I know that this is far from the ideal: ie editing source files from desktop and rendering to the desktop on the system drive (something I would not normally do, but I did not have an FW800 external drive available). I don't like PPro to edit with and was using to compare to my Mac Pro.
    The same clips card were on my internal raid 0 on my Mac Pro. I loaded them onto the timeline in Premiere Pro and it struggled at preview quality and the render to an external esata drive was showing in excess of 15 hours!
    I am amazed. But this raises questions for me too. The core i3 is a 3.06 GHz cpu (hyperthreading but no turbo boost) and shows as four cores (two real, two virtual) in activity monitor. They were at 310% when playing back the avchd files. If I get the 2.8GHz Mac Pro there will be eight cores and turbo boost. Will this be faster than the core i3 in playing back footage and much faster in rendering? Or does the higher clock speed of the i3 mean that for editing it is better but will lose out to the Nehalem Xeon when rendering?
    Translating these finding to an FCP context, might this mean that a rewrap of the avchd to h.264 for editing in FCP is possible? In some cases this might be preferable to transcoding.
    I cannot get over how much better the core i3 performance is over the Woodcrest Xeons. This makes me wonder if the Nehalem Xeons are as good if not better?

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