Im not sure why this is happening or how to fix it?
One day it just slowed down a lot. A few days later, I tried going into safe mode to see causes, then it just shut down in the middle of restarting. It just shuts down every time you try to boot it up. When the bar hits the middle of the apple logo, thats when it shuts down.
iMac
Based on your situation, I recommend service.
Service Checklist:
Click ▶︎ Start a Service Request. ⚛️
Need more help?
Click ▶︎ Check Repair Status.
tao73 Said:
"iMac shutting down on startup: Im not sure why this is happening or how to fix it?"
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Troubleshooting a Re-Booting Mac:
A. Try Safe Mode:
In Safe Mode, login items do not run, and corrupt system files(i.e. caches) are intentionally reset as a way to fix issues
B. See if your Hard drive is Failing:
What to Try:
Can you tell the iMac model?
Older models have issues with power supply or GPU what can cause issues like this.
👍
iMac shutting down on startup
