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I have a problem with a new re-installation of Catalina. I am getting the following: "Macintosh HD" is locked" Pop-up message on every start up.

After going into disk utility I have the following:

  • Macintosh HD
  • Macintosh HD - Data
  • Macintosh HD - Data - Data

The "Macintosh HD" greyed out and I can't erase it. After googling around for a bit. I decided to try and run Disk utility First Aid in an attempt to unlock the disk. So it hopefully can be erased afterwards.

But the Disk utility First Aid have now run for more then 10 hours. The size of the disk is 500 GB but it still seems incredible slow.

  • Is this normal? Because I am worried it is stuck and will never complete.
  • And is it possible to erase the disk after it has been unlocked?

Here is a screenshot. I am sorry for the picture of a screen quality and the Danish language - But the Mac is stuck in disk utility so can't take a prober screenshot or chance language.

enter image description here

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  • Great question. I’ll try to come back when I’m at my Mac, but I bet others will have ideas. Is it possible you have a backup or do you need to pause and hope to get your files back from this Mac?
    – bmike
    Apr 6 '20 at 20:42
  • Oh yea I forgot to add that I have all my important stuff backed up on icloud, so no issue there.
    – BjornL
    Apr 6 '20 at 20:49
  • iCloud is not a backup. It's a sync of everything. You may be able to get away with not losing your files, you may lose individual app settings - things that aren't sync'd to iCloud. Definitely look setting up Time Machine and have it run continually for better protection.
    – Allan
    Apr 6 '20 at 23:55
  • My company just provided me with a Macbook Pro for work and I'm having the same "issue". I searched for a bit online but I still didn't fully understand if this is a real issue or just an inconvenience of having that message popup at every login. Do you know the downside of using the OS with this problem? I ask that because everything seems to be working fine and since the computer is not mine I don't have the "authority" to format the disk and reinstall the system. I could ask the IT team for a solution but because of COVID quarantine that would take a while...
    – Thomas H.
    Jun 5 '20 at 12:16
  • 1
    Hi! Did you solve it? My new brand mac book pro is having the sane issue.
    – Nico
    Aug 6 '20 at 2:34

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