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My iMac Retina SK, 27-inch, 2020
3,8 GHz 8-Core Intel Core i7
AMD Radeon Pro 5500 XT 8 GB
40 GB 2133 MHz DDR4
has been of a State of the Art 24/7 from the beginning...until Sequoia 15.1.1
Now and then all activities are unjustifidly shut down and I look into a black screen.
In order to restart I have to wait sometimes at least a couple of hours.
What to do?
iMac 27″, macOS 15.1
See if the following user tip article can help: Mac Basic Startup Troubleshooting Steps
iMac troubles
