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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.


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27 replies

Mar 6, 2015 8:49 PM in response to racefanatic

All paths forward require you to buy the Physical DVD from the Apple Online store and install it. It will install 10.6.3. Then use software Update to get it up to 10.6.8. At 10.6.8, the Mac App Store appears, so you will be able to get later software (like 10.7) by download.


But 10.7 is not generally available for direct download. You go to the Apple Online store again, and this time, buy a 10.7 download code. It will be delivered by email in 1 to 3 days, and human intervention is required, so it won't show upon the weekend. With those emails come instruction on how to obtain 10.7 Lion form the Mac App store (by download). You can't get 10.7 new today without a download code (specific to your account).

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

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