Boot gets stuck on the gray screen before usual desktop appearance
my iMac suddenly stopped working (no cursor movement, no keyboard feedback, nothing), got stuck and I rebooted it manually.
After that, the boot process ends and gets stuck on a completely gray screen, after the startup sound, apple and loading bar.
I tried almost all software solutions (NVRAM reset, HD Recovery, incompatible .kext deletion).
The only way I'm able to boot the iMac is in SAFE MODE.
During summer I noticed some graphic glitches, that's why I believe the problem is hardware related and caused by GPU or something related to graphic.
Is this a good question?