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Contribution d'origine par : Zachary Lunte ,


These kinds of issues can sometimes happen when there is damage to either the headphone jack itself or the internal speakers. With Bluetooth turned off and headphones disconnected, what do you see when you attempt to adjust the volume? Does it show the volume adjusting or do you get a prohibitory symbol (a circle with a slash through it)? You can also try signing in with a guest account to see if the issue is related to your user account. Additionally you could try a PRAM reset (hold P+R+Option+Command during startup) to trigger the startup chime to see if sound is working in general (though some models won’t chime during startup so this isn’t the best test). If you have a bootable external drive you could try booting into a different drive - this would help you determine if it’s a hardware or software issue.