After having set our Mac back to factory settings (not because of problems but to give to someone new), it now won’t start up and instead comes up with this message once loaded. It also takes a very long time to get to this point as the loading bar is so slow
iMac Pro
Welcome to the Apple Support Communities.
Shut down the Mac, turn it on and immediately press and hold Option-Command-R for Internet Recovery. Then, reinstall macOS: How to reinstall macOS - Apple Support. Also, read: What to do before you sell, give away, or trade in your Mac - Apple Support.
Jack
Welcome to the Apple Support Communities.
Shut down the Mac, turn it on and immediately press and hold Option-Command-R for Internet Recovery. Then, reinstall macOS: How to reinstall macOS - Apple Support. Also, read: What to do before you sell, give away, or trade in your Mac - Apple Support.
Jack
Broken iMac
