My built in speakers have quit. I have followed the instructions from system preferences and still no sound
My built in speakers on my Mac pro stopped working. I followed system preferences and they still don’t work
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What specific Mac Pro?
Are the speakers listed in Sound Preferences?
Reset SMC and NVRAM (if applicable).
How to reset the SMC of your Mac - Apple Support
Reset NVRAM or PRAM on your Mac - Apple Support
Try booting to Safe Mode. That boot up takes minutes and clears caches and other things that may resolve your problem.
How to use safe mode on your Mac - Apple Support
A lot of times just boot to Safe Mode followed by normal boot resolves problems.