How do I unlock the volume on my MacBook Pro?

A MacBook volume is locked because of something wrong in the Macs sound settings, the internal speakers could be disabled or there might be is a build-up of dirt in the headphone port. To unlock it press F10, F11, or F12 on the keyboard for it to mute, decrease, or increase and clean the headphone port of dust.

What is startup volume on Mac?

A “startup disk” is a volume or partition of a drive that contains a bootable operating system. You can set your Mac to automatically use a specific startup volume, or you can temporarily override this choice at startup.

Why is my MacBook Pro volume not working?

On your Mac, choose Apple menu > System Preferences, click Sound , then click Output. Make sure “Internal Speakers” is selected, the “Output volume” slider is not all the way to the left, and the Mute checkbox is not selected.

How do I start my MacBook Pro in utility mode?

Click the Apple logo on your desktop. Click Restart. Immediately hold down the Command and R keys until you see an Apple logo or spinning globe appear. Choose from the Recovery Mode utility options.

How do I enable the volume buttons on my Mac?

Run Keyboard System Preferences. Next, check if the option for function keys is enabled or disabled. If it is allowed, make sure to turn it off. The enabled function key option is one of many reasons why your volume control keys on F10, F11, and F12 might not have been working.

Why is volume locked on my Mac?

Look in the Sound control panel in System Preferences under the Apple menu. Make sure Input is set to microphone and Output is set to Internal Speakers. Open Audio MIDI setup; it is in the Utilities folder within the Applications folder. Make sure that it is set to Built-in Output.

Where is my Mac startup disk?

Determine which disk started up your Mac

1. On your Mac, choose Apple menu > System Preferences.
2. Click Startup Disk . Your selected startup disk is shown at the top of the preferences pane.

How do I reinstall my Mac startup disk?

Choose Apple menu > Shut Down, press and hold the power button until “Loading startup options” appears, select Options, click Continue, then follow the onscreen instructions. In the Recovery app window, select Reinstall for your macOS release, click Continue, then follow the onscreen instructions.

How do I fix my MacBook Pro speakers?

Fix MacBook Pro Speakers Crackling and Buzzing

1. Roll Back Your macOS Version.
2. Create a New User Account.
3. Use a Different Audio or Music Software.
4. Increase I/O Buffer Size to 1024.
5. Kill Core Audio.
6. Restart Your Mac in Safe Mode.
7. Reset NVRAM and SMC.
8. Boot into macOS Recovery.

How do I reset the sound on my Mac?

Reset Core Audio

1. Click the Spotlight search icon and search for “Terminal.”
2. Launch Terminal and type: sudo killall coreaudiod. in the input window and press Enter. Type in your password if asked.
3. Once you reset the API, test your sound to make sure it’s working properly.

How do you start a MacBook in safe mode?

How do I start a Mac in Safe Mode

1. Start your Mac.
2. Press and hold the Shift key.
3. The Apple logo should appear.
4. When the login window appears release the shift key and log in.
5. You may be required to log in twice if you have FileVault turned on.