OS X Mountain Lion will not run on a large number of older Mac systems. Among other things, the original MacBook Air, the iMac at the end of 2006 and the Mac mini from 2007 to the without the operating system.
A developer has the list of supported systems from Mountain Lion to The Unofficial Apple Blog handed. On desktopgebied the iMacs of late 2006, no longer supported, while the Lion could turn. Also the Mac mini from mid-2007 and the original Mac Pro and its update of 2007 to lose the support. In addition, the new operating system, not to the Xserve systems at the end of 2006 and beginning of 2008.
What notebooks is OS X 10.8 not to most of the MacBooks that are not unibody. This is true for all plastic models, while the MacBook Pro’s, which for June 2007 came the outside of the boat fall. Finally, it can also make the original MacBook Air is not an upgrade to meet.
It is unclear why the relevant systems Mountain Lion would not be able to run. The list is also not yet officially by Apple and published, as he really is, for the time being only on the Developer Preview of application. In the past that has meant the arrival of new OS X versions also often that older systems cannot access more about the latest version could do, so could Lion not run on systems that do not have at least a 64bit-Core 2 Duo from Intel at that time. Incidentally, let Apple the designation ” Mac ” for Mountain Lion, and it refers to the manufacturer under the heading of OS X 10.8 to the operating system.