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chama98

macrumors 6502
Original poster
Feb 13, 2014
359
202
London
recently I have been having sound issues with my iMac. playing music and YouTube videos causes the Mac to play at normal volume which is good. Then over a few minutes the volume will slowly decrease. Causing me to restart my Mac to restore normal volume.

What I have done is:
reset NVRAM thinking it could be that.
reset SMC thinking it could be that as well.
I have also cleaned the headphone plug and also made sure that there is no dust in the headphone jack.

I also ran Apple Hardware tests and that all came back without any errors.

I also performed a reinstall and restore my time machine backup.

I am thinking that it could be a bug within the OS software.

I am wondering if anyone else is experiencing this as well. I am also thinking of downgrading back to Mojave.

Welcome any thoughts and other ways to sort the problem out.
 
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