iMac - will not startup

[Bluesifi]

Today my iMac will not start, I have a ‘your computer restarted because of a problem’ error in black and when ever I restart I get same error.

I normally leave on overnight and error must have happened then. Was using yesterday with no issues.

I have tried safe mode but again same error, and also Command R on start but still no joy.

anyone have any other options. It is 2019 iMac on os Catalin.

 

[barbu]

Bad luck there. Can you start up to the boot chooser (hold Opt at boot)? Do you have a bootable USB or HD around to try? Also, make sure to unplug all accessories except kb/mouse.

 

[Longkeg]

This is something major. You need to take it to an an Apple Store or an authorized Apple repair agent for further evaluation. Might help if you specify whether it’s a 21.5 or 27 inch iMac.

 

[Bluesifi]

Thanks it is a 27 inch. I am booked at Apple store tomorrow, hopefully our COVID tier will not change today.

 

[Fishrrman]

Can you boot to INTERNET recovery?
This is NOT "the recovery partition".

Command-OPTION-R at boot.
If you use wifi, you'll need your wifi password.
The utilities take a while to load -- be patient.

If you can get to the internet utilities, try disk utility's "first aid" feature.
If that gives a good report, you could try re-installing the OS...

 

[Longkeg]

Thanks it is a 27 inch. I am booked at Apple store tomorrow, hopefully our COVID tier will not change today.

The reason I asked is the 27 inch has easily replaceable RAM while the 21.5 inch model has the RAM soldered in place. Bad RAM can cause all kinds of problems but I doubt that’s the case here.

Definitely try Fishffman’s advice and procedure. He’s thinking it’s a software issue while I’m thinking hardware. If he’s right his is the easier, cheaper fix. if his suggestions don’t work.... Good luck at the Apple Store tomorrow.

 

[Bluesifi]

tried the internet recovery already and No luck. Will see what they say tomorrow, Mac only 4 months old so still on warranty

thank for all the advice

 

[Bluesifi]

Just to update you, I took it to Apple and they have said it is hardware issue with RAM and will need to replace this, which is covered on warranty