OS X Mountain Lion has been released and available for download. This new release comes with over 200 new features such as Twitter integration, Apple's Game Center, iMessage services, and a new security feature called Gatekeeper to protect users from malware. However, new operating system is not compilable with all mac computers.
How do I find out Mac can run Mountain Lion?
You need to find out your Mac ID by clicking the Apple icon at the top left of your screen, choosing About This Mac, then clicking More Info:
My CPU is 64 bit but I can not upgrade to version 10.8. Now, options are either get a new 15" Mac Book Pro or Mac Book Air or keep continue using computer that I brought in 2008. Your Mac computer must be one of the following models to use Mountain Lion:
- 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)
According to this post the reason is related to graphics drivers:
Apple declined to tell us the reasoning behind leaving some of these models out of potential Mountain Lion upgrades, but we suspected it is related to an updated graphics architecture that is designed to improve OS X's graphics subsystem going forward. Our own Andrew Cunningham suspects the issue is more specifically related to graphics drivers, since the GPUs not supported under Mountain Lion have drivers that were written before 64-bit support was common.
See this page for more information.