iMac
Does anyone know how to fix an iMac that will not boot up. I have run the disc utility and ran first aid and the Apple screen has been attempting to boot up for the last several hours.
iMac 21.5″, macOS 10.15
Begin with If your Mac won't turn on and if you still cannot get it to run, please make an appointment at your local Apple Authorized Service Provider to have it professionally diagnosed.