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The computer frequently fails to start up and when it does, everything runs slow or stops responding. I’ve tried a few solutions that failed to work. I’ve backed up my files to an external hard drive. How do I restore the iMac back to factory settings?
[Re-Titled by Moderator]
iMac 21.5″, macOS 14.5
It could be some 3rd party software that's causing the performance problems. If you haven't already erased the drive please download and run Etrecheck. The free version is sufficient.
Copy the report as shown in this animated screenshot
and use the Additional Text button to paste the report in your reply.
Then we can examine the report and see if we can determine the cause of the problem.
The reason for checking before erasing is if you restore your user data from a Time Machine backup and it's 3rd party software that's the culprit you'll just be restoring the culprit when you restore your user data.
Hi,
You should also see following article.
What to do before you sell, give away, trade in, or recycle your Mac - Apple Support
How do I restore the iMac back to factory settings?
