If you can't hear sound from your Mac speakers - Apple Support
Audio & Sound Not Working in Mac OS X? It's an Easy Fix | OSXDaily
Sound Not Working on Mac? 7 Ways to Fix
No output devices found - Apple Community
What to do if the sound on your Mac isn't working | Macworld
MacBook Pro Speakers Not Working [Fixed]
Please help. My MacBook Pro can't find any internal speakers. No sound working, even through headphones. Doesn't even make the Mac startup gong when it turns on : r/mac
SOLVED: No audio, and no "Internal Speakers" in SystemPrefs>Sound>Output - MacBook Pro 13" Retina Display Late 2013 - iFixit
Fix "Mac No Output Device Found" Error [9 Proven Ways]
Audio & Sound Not Working in Mac OS X? It's an Easy Fix | OSXDaily
Mac no sound [SOLVED] - Driver Easy
Is there anyway to force a MacBook to output audio only to the internal speakers? - Super User