My MacBook is on permanent mute
my macbook is on permanent mute, helppp
[Re-Titled by Moderator]
MacBook, macOS 10.15
Have you done a PRAM reset, CMD+Option+p+r...
http://support.apple.com/kb/HT1379
In fact, do 3 in a row, takes a bit of time.
Intel-based Macs: Resetting the System Management Controller (SMC)...