Speaker is not working on my MacBook Pro 13
MacBook Pro speaker is not working well
MacBook Pro 13″, OS X 10.10
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Hi,
Resetting NVRAM could solve sound related issues.
Reset NVRAM or PRAM on your Mac - Apple Support
If it doesn't help, try to check your speaker with Apple Diagnostics if it reports audio related issues(VFF001, VFF002, VFF003).
Use Apple Diagnostics to test your Mac - Apple Support