Mac OS X
Q: Mac os sierra installation failed, how do I get back to os x yosemite
today i install mac os sierra on macbook pro 2012, however I have a problem when it says Mac OS could not be installed on your computer, close the installation to restart your computer and try again, I tried to shut down the installation and then I was directed to Startup disk, but still can not get out, I tried to restart my macbook, macbook when lit reinjected into penginsatallan sierra and remained unsuccessful.
I hope you can help me to return to my old os (yosemite)
I was a little panicked right now
I am sorry, my English is not good
MacBook Pro
Posted on Sep 21, 2016 12:32 AM
