Golden Master version of the Mountain Lion is 99.9% complete build, which goes before the public release with the following objectives:
- The final finishing applications under the new firmware;
- Search the latest unresolved bugs.

Additional Information:
Existing users can upgrade to Mac OS only with the new-last stable version of Mac OS X 10.6.8 Snow Leopard, so that their computer must be at least compatible with this operating system.
The official price in the App Store is expected in the region of 600 rubles.

Mountain Lion can be installed on the following computer models:
iMac (Mid 2007 or newer)
MacBook (aluminum, late 2008 or early 2009 or later)
MacBook Pro (mid / late 2007 or later)
MacBook Air (Late 2008 or newer)
Mac mini (Early 2009 or later)
Mac Pro (Early 2008 or later)
Xserve (Early 2009)

The recommended method of installation:
A. Burn the downloaded dmg image to a DVD (preferably DVD-DL).
Two. If you turn on your Mac then hold down "C", so starts to boot from the disk.
Three. Follow the installation instructions.

Or create a bootable USB flash drive in Disk Utility:
A. Tab "Partition Drive", below "Options" - Create a partition GUID, formatting a Mac OS Extended.
Two. The tab "Restore" - Restore it downloaded dmg.
Three. If you turn on your Mac hold down the "Option", select our flash drive and follow the installation instructions.

System requirements:
• 2 GB of RAM.
• 8 GB of hard disk space.
• x64 CPU Intel (Supports: Core 2 Duo, Core i3, Core i5, Core i7 or Xeon)