Unexpected shutdown:
My iMac 27" with macOS Mojave shuts down unexpectedly. What is the cause & how can I fix it?
iMac 27″, macOS 10.14
retired271 wrote:
My iMac 27" with macOS Mojave shuts down unexpectedly. What is the cause & how can I fix it?
Learn what to do if your computer restarts or shuts down unexpectedly, or you get a message that your computer restarted or shut down because of a problem.
If your Mac restarted because of a problem - Apple Support