Ursprünglicher Beitrag von: Erdem Akkaş ,
Mac halts after boot and restarts
Hi, My mac 2012 had black screen and fan yesterday. Then I powered off it and retried. This time it has loaded Catalina desktop and a few seconds later restarted. Now when I ry to power on either it shows black screen with fan sound or it desktop, restarts. I did NVRAM PRAM reset. I tried pressing D on keyboard to diagnostics but it did not load diagnostics. I tried recovery mode. It entered recovery mode but when in language selection halted and restarted. I plan to unmount, then try unplug and plug some cables inside. I appreciate any idea or suggestion. Thank you very much.
iMac Intel 21.5" EMC 2544