erasing and creating failed could not unmount disk

This will check the disk for any errors on the disk that can be repaired.ģ. If the disk is visible in Disk Utility but it did not mount, select the disk and click on First-Aid.

Follow the basic steps of checking whether the disk is properly connected to the system and powered on if required.Ģ. If this does not solve the issue, Disk Utility can become a handy tool to resolve the issue.ġ. The most commonly used resolution to fix the mount issue is to simply restart the system and connecting the disk again to check. Connecting Hardware: The SATA cable or USB through which the disk is connected to the system may be faulty and will prevent the disk from mounting. Power failure: A sudden power disruption may damage the connected disk and cause the storage device being unable to mount successfully on the system again.ĥ. This corrupts the disk permissions, which will later prevent the device from mounting properly.Ĥ. Unsafe removal of the disk: The most common reason that damages the disk is removing or ejecting the drive from the system without adequately un-mounting it from the system. Corrupt Disk: The disk or files residing on the drive may be corrupt and are preventing the disk from being accessible on Mac.ģ. If this is not the case, the disk will not be recognized.Ģ. Incorrect formatting of the disk: The disk that needs to be connected to the Mac system has been formatted in Mac OS Extended (Journaled) format or other Mac supported formats. From the number of possible reasons for this to happen, below listed are a few common issues:ġ. Besides, the Disk Utility may display an error message saying could not mount the disk or may freeze during the mounting process. External Drive Mounting Issues on MacĪfter connecting the external hard drive to the Mac, it may not show up as the connected devices.

The later part of the article covers the possible issues with issues that may arise and solutions to fix the same. At times, the drive may be not detected automatically. Select the disk and click on the mount to make it accessible by the operating system.

If everything is working fine on the disk, it should be visible on the left-hand-side menu of Disk Utility. Hard drive mounting can be done manually using Disk Utility found under Utilities folder too.

Usually, disk mounting is an automatic process and happens when the external hard drive gets connected to Mac via one of the USB ports. Mounting an external disk intends to make the storage device available for macOS to perform read and write operations on it. How to mount a drive using Disk Utility on Mac

Erasing and creating failed could not unmount disk