So, if you have the above hardware or newer (in any configuration, it doesn't matter if you did or didn't buy extra RAM or disk space or the better CPU) then you are good to go with Yosemite. This, incidentally, is the same list of hardware that can run OS X 10.9 Mavericks. Reinstall OS X: Select Reinstall OS X and click on the Install button. the Erase button and wait until the process has completed. Click Continue, then follow the onscreen instructions. I burn the installer to a USB, and perform a clean install on the system to rid it of all the grime and useless files that have accumulated ov. For the most part I tend to treat Mac updates like I do the ones on Windows. the Security button and set the Zero Data option to one-pass. Install macOS Choose Reinstall macOS (or Reinstall OS X) from the utilities window. Answer (1 of 4): Download the update from the App Store and have it install.
With that out of the way, here's a listing of the oldest Apple hardware capable of running OS X 10.10 Yosemite. Set the format type to Mac OS Extended (Journaled.) Optionally, click on.
