Yosemite runs on all Mavericks Macs
According to Apple, Yosemite is with all Macs compatible with the currently installed OS X 10.9 Mavericks. This means that the system requirements have changed in the new Updates.

OS X Yosemite compatibility
The following devices the new OS X Yosemite get
The Apple-specified list for compatibility is designed for the test version of Yosemite. However, this compatibility for the final Version of Yosemite is hardly.
- iMac (mid 2007 or newer)
- MacBook Air (late 2008 or newer)
- MacBook (late 2008 Aluminum, or early 2009 or newer)
- Mac Mini (early 2009 or newer)
- MacBook Pro (mid/late 2007 or newer)
- Mac Pro (early 2008 or newer)
- Xserve (Early 2009)
If you already now the new OS X Yosemite in Beta Version to test, so we will show you how to protect yourself for the Beta program of Yosemite sign up.
