List of macs that are unable to upgrade to Mountain Lion.

[chrisNova777]

  these machines are unable to be upgraded to mountain lion due to hardware limitations

http://web.archive.org/web/20120217153222/https://www.cultofmac.com/146957/mountain-lion-kills-os-x-support-for-a-number-of-macs-heres-the-list/

Here’s a list of the machines that can run Lion that can’t run Mountain Lion.

Although OS X Lion has a minimum spec requirement of an Intel Core 2 Duo processor, Mountain Lion’s heftier graphics requirements effectively puts these machines to pasture:

• Any Intel Core 2 Duo MacBook from late 2007 – late 2008 (Model Numbers: MB061*/B, MB062*/B, MB063*/B, MB402*/A MB403*/A MB404*/A, MB402*/B)

• The Mid-2007 Mac mini (Model Numbers: MB138*/A, MB139*/A)

• Late 2006 polycarbonate iMac (Model Number: MA710xx/A)

• The original early 2008 MacBook Air (Model Number: MB003LL/A)

If you’ve got any one of these machines, OS X Lion will be the last version of OS X you will be able to install.