I want to upgrade my macOS, but the installation program won't allow me to do so because it says, "This disk is used for Time Machine backups." I don't understand why because I have never used Time Machine.
I want to upgrade my macOS, but the installation program won't allow me to do so because it says, "This disk is used for Time Machine backups." I don't understand why because I have never used Time Machine.
iMac with Retina 5K display, OS X El Capitan (10.11.6)