Can't reinstall macOS on iMac I accidentally unmounted and erased the Macintosh HD in disk utility and restored to the OS X Base System, and now I can't reinstall macOS. The only disk that shows up in disk utility is the OS X Base System. Please Help!!!
use Command+R For Internet Recovery To the version you were using and Command + Shift + R for internet recovery (to The latest version). When you will go to internet recovery a disk utility option will be there and u can configure , format your hdd there and install new os