I have an iMac late 2012, upgrade the hdd to sdd, and upgrade the main memory to 32 Gb
It was functioning well, but after almost 9 years now it has stopped to start, it yields in the apple logo and the progress bar freeze at 60% aprox
I tried to start from recovery mode, run diagnosis test, and nothing. Even tried boot from bootable USB with Catalina, it behaves exactly the same.
iMac Line (2012 and Later)
Read these documents for suggestions:
If your Mac doesn't turn on - Apple Support
If your Mac starts up to an Apple logo or progress bar - Apple Support
If your Mac doesn't start up all the way - Apple Support
You may entertain the idea of consulting with Apple but take note of limitations you may face when taking a 10 year old Mac to Apple:
Obtaining service for your Apple product after an expired warranty - Apple Support
Apple has discontinued support for certain technologically obsolete and vintage products.
Read these documents for suggestions:
If your Mac doesn't turn on - Apple Support
If your Mac starts up to an Apple logo or progress bar - Apple Support
If your Mac doesn't start up all the way - Apple Support
You may entertain the idea of consulting with Apple but take note of limitations you may face when taking a 10 year old Mac to Apple:
Obtaining service for your Apple product after an expired warranty - Apple Support
Apple has discontinued support for certain technologically obsolete and vintage products.
Mac not booting
