is my mac compatible with mountain lion? Serial Number #W8******XAG
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Don't post your serial number online... that's not a good idea, and doesn't really help anyway.
The list of machines that will support Mountain Lion can be found here:
If you aren't sure which machine you have, go to About This Mac in the Apple menu, then click the More Info button.
http://support.apple.com/kb/HT1635 (Macbook model numbers)
Applicationc Compatability. Power PC applications are not supported. You can partition your hard drive so you can run PC applications: