Currently Being ModeratedDec 3, 2012 10:34 AM (in response to ItsGeorgios)
You can't. You must be logged into the App Store from a Mac running at least Snow Leopard 10.6.8 in order to purchase and download Mountain Lion.
Currently Being ModeratedDec 3, 2012 10:37 AM (in response to ItsGeorgios)
The details will depend upon which system came with the computer originally.
If this came with Mountain Lion originally:
https://discussions.apple.com/thread/4177979 - Reinstalling Lion on a computer that originally came with Lion installed (older topic but probably the same for ML).
Currently Being ModeratedDec 4, 2012 3:50 PM (in response to ItsGeorgios)
thanks guys i loged in, with my friend id, and then i change it from appstore. Just purchased Mountain lion..