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Cannot upgrade from Lion to Mountain

367 Views 6 Replies Latest reply: Feb 10, 2013 9:38 AM by BitterCreek RSS Branched to a new discussion.
kosh82 Calculating status...
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Feb 6, 2013 5:21 PM

Hi everybody,


My brother just gave a Mac Pro 2006 (MA356LL/A), he was running leopard 10.5 server OS, I installed mountain (not server) to use it as my desktopand it is running great, Now, My question is WHY I CANNOT UPGRADE TO MOUNTAIN LION, when I try to upgrade it says that that the machine does not support it..


Technical Specifications


Two 2.66GHz Dual-Core Intel Xeon processors

5of 667MHz DDR2 ECC fully buffered DIMM

NVIDIA GeForce 7300 GT 256MB (single-link DVI and dual-link DVI)

500GB x 3 Serial ATA 3Gb/s; 7200 rpm; 8MB cache



Mac Pro, Mac OS X (10.7.5)


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