Hi all my 27inch imac (2011) began restarting randomly after which the screen looks very odd with strange graphics - this problem cropped up recently and has caused me to reinstall the system software many times, but no joy. I've attached an etrecheck report below; any ideas?
Thanks James
iMac 27″, macOS 10.13
Hi James Fraser,
Welcome to Apple Support Communities
I have reviewed your EtreCheck report, and you have a runaway process, and your SSD might be having trouble. Go to Activity Monitor (Finder > Go > Utilities > Activity Monitor) and see if there is a listing for a process using a lot of your CPU.
When you say you've reinstalled, does that include an erase first?
Have you tried running First Aid? How to repair a Mac disk with Disk Utility - Apple Support
Have you tried an Apple Diagnostic? Use Apple Diagnostics to test your Mac - Apple Support
Have you tried a SMC reset? How to reset the SMC of your Mac - Apple Support
And have you tried a PRAM reset? Reset NVRAM or PRAM on your Mac - Apple Support
Let me know!
Cheers,
Jack
Hi James Fraser,
Welcome to Apple Support Communities
I have reviewed your EtreCheck report, and you have a runaway process, and your SSD might be having trouble. Go to Activity Monitor (Finder > Go > Utilities > Activity Monitor) and see if there is a listing for a process using a lot of your CPU.
When you say you've reinstalled, does that include an erase first?
Have you tried running First Aid? How to repair a Mac disk with Disk Utility - Apple Support
Have you tried an Apple Diagnostic? Use Apple Diagnostics to test your Mac - Apple Support
Have you tried a SMC reset? How to reset the SMC of your Mac - Apple Support
And have you tried a PRAM reset? Reset NVRAM or PRAM on your Mac - Apple Support
Let me know!
Cheers,
Jack
Hi Jack
thanks for getting back so quickly. In answer to your points; yes I've erased and reinstalled, even tried to convert the drive back to Mac OS Journalled type but no luck.
Yes I've tried First Aid in disk utility in recovery mode - I check show all devices and it can only run First Aid on the top level - not container disk or the install part of the disk
Can't get Apple Diagnostics to work on this iMac - I think it's too old?
Yes tried SMC and PRAM resets
Can't see anything using a lot of CPU in Activity Monitor - but it still says 99% in idle?
Hmm, thanks for your help Jack - maybe I'm not looking in the right place?
James
Looking at your EtreCheck report in collaboration with what you’re saying, it is possible that your SSD is failing. EtreCheck says it should be performing better, and you’ve already done everything a user can do to attempt to fix the Mac. However, considering the weird graphics issue, you may also have a GPU/Logic Board Problem. Either way, there’s definitely something going on, most likely with hardware.
Cheers,
Jack
Thanks Jack
bad news but best to know
thanks again
James
Do you have a picture of what the screen looks like with the graphical glitch?
iMac restarts randomly, screen looks weird and doesn't work
