Apple Macintosh computer (Mac): Generally, you'll need to have a Mac in order to install OS X Yosemite.If you're thinking about upgrading to Yosemite, you'll need to make sure your computer meets all of the software and hardware requirements.
en/macosxyosemite/new-features-in-os-x-yosemite/content/ Upgrading to OS X Yosemite
