Mountain Lion signals end-of-life for older Macs

In its announcement of OS X 10.8 Mountain Lion on Thursday, Apple failed to mention that a handful of Macs that will be cut from the fold when the next generation operating system debuts this summer due to end of support for older Intel integrated graphics chipsets.
http://www.appleinsider.com/articles/12/02/16/mountain_lion_signals_end_of_life_for_older_macs.html