iMac black screen
This morning my iMac screen was black and the computer will not boot. It has the latest operating system
Your computer restarted because of a problem. Push any key to continue restarting or wait a few seconds. The apple comes on the screen and the progress bar progresses about half way then everything goes black. Help please
iMac with Retina 5K display, iOS 10.1.1, 32 GB ram