there is no sound on my mac what do I do

To 'toggle the settings' as suggested, is a way to try & make it work.

After awhile, if not successful, further troubleshoot may be indicated.

This is one of two main resets that could be useful to resolve the issue.

• Reset NVRAM or PRAM on your Mac - Apple Support

https://support.apple.com/en-us/HT204063

Another thing may be to see if SMC reset could help. As instructions had

changed with newer systems and hardware; this is not traditional answer.

Take care & good luck!🌞🐝

Mute

then

unmute

in sounds, system preferences

this usually remedies that problem