
Resetting the NVRAM also resets those options to default. Once you’re back in macOS, you’ll want to head to System Preferences and double check that your Display, Date & Time, and Startup Disk settings are what you want them to be. Keep holding these keys for at least 20 seconds after you see the Apple Logo, or until you hear the s econd startup sound for older models of Macs that still have that chime.Power on the laptop, and as soon as the power comes on, hold down Command + Option + P + R.Shut down your Mac (NOT via sleep using the power button).Disconnect all devices from the Thunderbolt and USB ports (except for your keyboard, if needed).If you have an Intel Mac, here’s how to reset the NVRAM: Many glitches and general Mac weirdness can result from something going wrong with the data in NVRAM, which is why resetting it is something you should try if your audio levels aren’t normal and nothing else you try works, This special type of memory (formerly known as PRAM) stores configuration information. Check whether your MacBook has any pending updates, and install the latest version of macOS that your Mac supports, such as Big Sur or Monterey.Īudio glitches can often be resolved by resetting Mac’s NVRAM (non-volatile RAM). Sometimes audio issues are the result of bugs or incompatibilities with newer software. These methods do exactly the same thing, so it’s up to you! Select it and then press the X button to kill the process. Suppose you don’t want to use the Terminal open Activity Monitor and look for Coreaudiod.


If you have Bluetooth headphones paired with your MacBook, disconnect them or switch to another audio output as described above.
