My Mac PC s audio isn’t working even though I followed the above given steps
The audio isn’t working since 3-4 days.
iMac 21.5″, macOS 10.14
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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)...