Can my Mac run OS X Mountain Lion?
Time marches on and Apple’s never been shy about dropping legacy technology compatibility and the company’s latest, greatest operating system, a.k.a. OS X Mountain Lion, cuts off a huge number recent Macs, many less than three years old — ouch. Get the details here.
OS X 10.6 Snow Leopard dropped support for PowerPC Macs and OS X 10.7 Lion dropped the Rosetta PPC emulation environment, as well as the earliest Core Solo and Core Duo Intel Macs.
With OS X 10.8 Mountain Lion, which is currently available as a developer beta, the cut is Intel’s 950GM and X3100 graphics — Macs running those graphic subsystems aren’t supported. Further, you will need a Mac with a 64-Bit Intel Core 2 Duo processor or better.
Rather than trying to make sense of that, here are separate lists of which Macs will and won’t run OS X Mountain Lion.
Macs that live on: (DP4)
• iMac (Mid 2007 or newer)
• MacBook (Late 2008 Aluminum, or Early 2009 or newer)
• MacBook Pro (Mid/Late 2007 or newer)
• MacBook Air (Late 2008 or newer)
• Mac mini (Early 2009 or newer)
• Mac Pro (Early 2008 or newer)
• Xserve (Early 2009)
And, the dead Macs walking:
• Late 2006 iMacs: iMac5,1, iMac5,2, iMac6,1
• All pre-unibody MacBooks (MacBook2,1, MacBook3,1, MacBook4,1)
• MacBook Pros released prior to June 2007 (MacBookPro2,1, MacBookPro2,2)
• Original MacBook Air (MacBookAir1,1)
• Mid-2007 Mac mini (Macmini2,1)
• Original Mac Pro and its 8-core 2007 refresh (MacPro1,1, MacPro2,1)
• Late 2006, early 2008 Xserves (Xserve1,1, Xserve2,1)
I haven’t read anywhere how much RAM you will need, but 2GB seems a reasonable assumption.
On the OS side, you will need Mac OS X 10.6.8 (Snow Leopard) or later — additional details from Apple.