iMac 27" Late 2009 freeze and boot stuck at 50%

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francy88 Author

Level 1

11 points

iMac 27" Late 2009 freeze and boot stuck at 50%

Hi,

from some days my iMac sometimes freeze (only mouse can move) and, after an hard shut down, boot stuck at 50%.

iMac version: 27" late 2009

macOS High Sierra 10.13.1

It random freeze (also when I'm only using Firefox) and I can re-boot normally only after some PRAM resets or after entering in safe mode. After that I can use it normally whitout any visible problems, but randomly after some it happens again.

Any advices?

Thanks

Francesco

iMac, macOS High Sierra (10.13.1), 27" Late 2009

Posted on Nov 14, 2017 2:32 PM

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Answer 1

rkaufmann87

Level 10

140,364 points

Nov 14, 2017 4:10 PM in response to francy88

Try booting into the Recovery Partition by holding down Command + R when you hear the startup tone. If it starts open Disk Utility and then run First Aid on the HD 2-3 times back to back. If any errors occur then take the computer into your local AASP to have the HD replaced.

Post back with your results please.

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Answer 2

francy88 Author

Level 1

11 points

Nov 15, 2017 12:54 AM in response to rkaufmann87

Hi, I tried to do as suggested, but from recovery mode the First Aid response something like that (translated from italian):

"Unable to repair the volume because other APFS volumes are enabled in its container. Deactivate them or make the repair while another macOS system is in execution".

After that I boot in safe mode and I run First Aid from here 3 times without errors. Rebooted and not able to boot normally again 😟

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