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whats the latest os i can run on my mac pro 1.1

I was given an older MacPro 1.1 with Tiger and want to know whats the latest OS i can run on it.

Mac Pro, Mac OS X (10.4.11), 4Gig memory 2x Dual core 2.66

Posted on Feb 28, 2015 9:06 PM

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Posted on Feb 28, 2015 9:13 PM

Mac OS X 10.7.5. Getting there requires going through 10.6.3 and 10.6.8.


(123304)

27 replies

Mar 17, 2015 11:16 AM in response to lllaass

Try these, using 8x2GB of these in mine, $21 pair

http://www.amazon.com/BUFFERED-PC2-5300-APPLE-Arch-Memory/dp/B002ORUUAC/


If you want performance - I would first put an SSD in before even bothering with the 5355's 2,1 upgrade.


Someone said Apricorn Velocity is bootable on 2006 Mac Pro. I chose just use SATA II which was fine until I got XP941 which cost $19 for an adapter but $142 for 128GB (2x what 128GB 850 EVO costs). But not a controller and is bootable and 400MB/sec writes and 800MB/sec reads.

Apr 7, 2015 6:22 PM in response to racefanatic

Well everyone thank you for all your input my MacPro is now like a new kid again I've got the two new 5365 cpus in and its running like a champ had an issue with the fans running wide open I tried the smc software but it didnt seem to work but I did find another one called Mac's Fan Control worked like a champ fans back to normal I also did the firmware upgrade now it sees it as a 2.1 and so far good..

Sep 24, 2015 9:08 PM in response to binxy

I up'd the OS as far as i can go 10.7.5 for now I cant get to 10.8 it errors out on me and I think its cause of the original video card I have seen a lot of suggestions on replacements and not sure what to go with I see you have the 5770 which is one I'm leaning towards. I'm not into gaming or heavy PS, I do like/want to be able to add a second monitor later so I'm open to what everyone has to say

Sep 24, 2015 10:41 PM in response to racefanatic

Hi its not as simple as just upgrading, from 10.8 32 bit EFI support was dropped which the Mac Pro 1.1 runs on so the installer needs to be modified to work. With 10.9 and 10.10 i used a free tool called SFOTT to build a compatible installer but for 10.11 this isn't there yet so to get round this i installed this to an external drive using a Macbook that supports 10.11, i then ran a script called PikeYoseFix, this mods the EFI to work in a 32 bit machine, i then restored that drive to a free drive in my mac pro and thats the screen shot above. The 5770 works fine for me and supports dual monitors, i bought a Sapphire 5770 and then flashed it to be seen correctly by the Mac, this cost £40 off eBay the office Apple ones cost £100+ on eBay.

Sep 29, 2015 7:39 PM in response to binxy

I've done some searching and found a lot of people have done the same thing as you, I was wanting to know the difference between the 5870 and the 5770 i'm leaning towards the ATI version since I have that as memory as well I just like to keep things matching as much as possible I'll do some research on the cards to see which I want..I'm not sure if I want to go up to 10.10 just yet. I want to get this thing working smooth before i through a bunch of stuff at it...TY for the reply

whats the latest os i can run on my mac pro 1.1

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