OS X Mountain Lion does not support models before 2007. Photo: Slashgear.
According to Slashgear, Apple's latest OS X version does not support the MacBook, MacBook Pro, and desktop models released before 2007. The minimum hardware requirements of OS X Mountain Lion also eliminate some of the history models. GMA 950 and X3100 GPUs. The Mac Pro model launched in 2007 and the Mac Mini introduced in mid 2007 cannot install OS X Mountain Lion.
Below are models that can run OS X Mountain Lion