When backing up your files on an External Drive, you can Repair the redundant volume by erasing it.ġ.

Open Time Machine and Select the desired Drive to perform the Time machine backup.Go to System Preferences from the Apple menu.So, to prevent an unexpected deletion of your important data, a backup is prescribed, and we will suggest you take a Time Machine backup and save the data to an external drive like USB, etc. With the erase of the volume partition, your data saved on that volume will get deleted. Before doing so, you need to have a backup of your Mac data. If the First Aid utility doesn't work, you need to delete the unused or duplicate partition. Then, at that point, reboot your Mac to check whether the 'Macintosh HD data' issue endures or not. Make sure to include all the Containers and volumes.ĩ. Doing so will help fix the Mac HD error.Ĩ. Run First Aid individually for the Container, Macintosh HD volume, Macintosh HD - Data volume, and any remaining volumes. Run the pop-up window and let First Aid start checking the hard drive.ħ.

From there, click the internal hard drive (Over the Container) situated at the left pane.Ħ. It will show the desired disks and drives.Ĥ.

Go to the View menu from Disk Utility > Show All Devices. Open the Disk Utility in Recovery mode.ģ. Keep holding until you see 'Loading Startup Options.' Select Options > Continue to get going.Ģ.

If you are using an Apple M1 Mac, press and hold the Power key on your system while your Mac reboots.

If you are using an Intel-based Mac, press and hold the Command + R keys on your keyboard while your Mac restart.

Go to the macOS Recovery mode and boot your system using one of the two methods: The method below will guide you to solve the Mac HD issue:ġ. That will be a bit time-consuming, but, is the most efficient method. The First Aid utility can be run from Disk Utility and will look at the hard drive (internal), the Container, and all volumes inside it to fix it. Part 2: How to Fix 'The disk Macintosh HD can't be unlocked'

From there, you can click 'Startup Disk,' and the startup disk will appear at the top pane. If you wish to view diskstartup, go to System Preferences from the Apple menu. The Macintosh HD is segregation of Mac startup disks used to isolate system files from viruses and corruption. As soon as the Macintosh HD is locked, you will not get access to those read-only files. It is a read-only volume where you can not create, edit, or delete files. The Macintosh HD is a storage drive having the files and apps. Now the concern is what does the disk Macintosh HD Can't be unlocked mean? To answer that, we must know what the Macintosh HD does. If your Mac is getting the disk Macintosh HD - data Can't be unlocked error, it means that the volume having the files is locked and can not be managed. What Does the Disk Macintosh HD Can't Be Unlocked Mean? Part 3: Lost Data after Erasing Mac Hard Drive? Part 1.

Macbook says disk is full