I have 2008 Macbook running OSX Lion 10.7.4 and on attempting to upgrade to Mountain Lion got a message that my compter was not compatible with Mountain Lion. is this correct/
MacBook, Mac OS X (10.7.4)
If it is an early 2008 4,1 MacBook then Mountain Lion will not work......it would take the late 2008 MacBook (Aluminum model) 5,1 minimum to install......
No, the model 4,1 Early 2008 MacBook will not be able to run Mountain Lion.
http://www.apple.com/osx/how-to-upgrade/
Your Mac must be one of the following models:
MacBook (Late 2008 Aluminum, or Early 2009 or newer)
It's the video card. Yours has the 144mb Intel GMA X3100 with non-upgradeable 32bit drivers. The model 5,1 Late 2008 and newer have at least the 256mb NVIDIA GeForce 9400M with 64bit drivers. Mountain Lion requires 64bit native drivers. Mountain Lion no longer supports Intel's GMA 950 or GMA X3100 graphics processors.
http://reviews.cnet.com/8301-13727_7-57387846-263/will-your-mac-run-mountain-lio n/
MACBOOK Mountain Lion compatibility
