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Jan 20, 2015 5:49 PM in response to _thatjustaudby stedman1,Which computer model do you have? Does it meet Yosemite requirements?
Before you install Yosemite, make sure you have one of these Macs:
- iMac (Mid-2007 or newer)
- MacBook (Late 2008 Aluminum, or Early 2009 or newer)
- MacBook Pro (Mid/Late 2007 or newer)
- MacBook Air (Late 2008 or newer)
- Mac mini (Early 2009 or newer)
- Mac Pro (Early 2008 or newer)
- Xserve (Early 2009)
Your Mac also needs:
- OS X Mavericks, Mountain Lion, Lion, or Snow Leopard v10.6.8, already installed
- 2 GB or more of memory
- 8 GB or more of available disk space
Some features of OS X Yosemite require an Apple ID or iCloud account and a compatible Internet service provider; fees may apply. Continuity features such as Handoff and Instant Hotspot require a compatible iOS device with iOS 8 and a compatible Mac.
You can also back up your Mac using Time Machine before you install.