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User profile for user: Rohanben
Rohanben Author
User level: Level 1
4 points

What will happen if I try to install Mountain Lion OS on my 2007 MacPro with Lion OS on it and two Dual Intel Zeon 3 GZ processors and 9 GB RAM?

What will happen if I try to install Mountain Lion OS 10.8 on my 2007 MacPro that has Lion OS 10.7 installed on it and has two Dual Intel Zeon 3 GZ processors and 9 GB RAM? Will it crash? The Apple website says Mountain Lion needs an early 2008 MacPro.

Mac Pro, Mac OS X (10.4.1)

Posted on Mar 27, 2015 2:28 AM

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User profile for user: lllaass
lllaass
User level: Level 10
210,411 points

Posted on Mar 27, 2015 2:35 AM

You need a hack to install ML or later on a 2006 and 2007 Mac Pro since those only have a 32 bit EFI while ML and later oare only 64 bit OSs.

For the hack see:

http://oemden.com/sixty-four-on-thirty-two-sfott/

Install OS X Mavericks on Mac Pro1.1

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What will happen if I try to install Mountain Lion OS on my 2007 MacPro with Lion OS on it and two Dual Intel Zeon 3 GZ processors and 9 GB RAM?

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