Restart the Mac PC, before appearing the Apple logo, you have to hold down a Command + S keys simultaneously to boot in to Single User Mode for Mac.So, here we would also like to recommend you to run the FSCK tool to troubleshoot Macintosh HD not mounted Catalina. Generally, the FSCK command utility is used to check a hard disk consistency and repair the disk errors with ease. You May Also Read: Mac Flashing Question Mark Folder Tap on First Aid & wait until the verifying & repairing errors.Choose an un-mounted Macintosh HD which you can see in the left side panel.From macOS Utilities, choose a Disk Utility > click Continue.Start a Mac PC & hold down a Command + R keys at the same time until the Apple logo appears on the screen.For this, simply follow the below-given steps: If a Macintosh HD fails to mount in the Disk Utility on mac, then you need to repair it by using Disk Utility in a Recovery Mode. Method 1: Fix Macintosh HD Not Mounted In Disk Utility Reinstall The macOS & Erase a Macintosh HD.Repair Unmounted Macintosh HD with A Terminal.How To Fix Macintosh HD Not Mounted?Ĭheck out the below-listed solutions and fix Macintosh hard drive not mounted effortlessly. Now, let’s move ahead to know how to mount Macintosh HD in disk utility with possible fixes. These are the major factors for the hard drive not mounting mac. If you are facing a hard drive not mounting problem with any external HDD then maybe the incorrect way of removing a disk is the root cause that is stopping you from accessing the hard disk. Power disturbance while mounting the hard drive on Mac PC can really damage it and throw different errors or bugs. Doing so can sometimes result in Invalid media or track 0 bad, disk not recognized, or other disk-related issues.

Most of the time, it happens the users use to format the SD card/hard drive in an incorrect way or use the wrong file system to format it. Although, a corrupt disk prevents you to access the data saved in it.

The root cause behind the HD not mounted is the corrupt disk.

How to get to macintosh hd library