No sound through headphones

[Ran Taib]

Hi
after an upgrade to Mac OS there is no sound on the headphones jack (connected to Harman Kardon speakers) was working perfect until the update
Any idea on a fix ?

 

[Taz Mangus]

Try doing a SMC reset.

Reset the SMC of your Mac - Apple Support

The SMC is responsible for managing power on your Mac. Resetting it can resolve certain uncommon issues related to power or thermal management.

support.apple.com

 

[mikzn]

sometime the preferences get stuck or just won't change to the selected output device

FWIW - I use "Sound Source" to quickly figure out why sound is not routed to the correct device - you can even create unique settings for each app - see screen shot - great time saver !