How to reformat a usb drive on a mac can not unmount

#HOW TO REFORMAT A USB DRIVE ON A MAC CAN NOT UNMOUNT FOR MAC#
#HOW TO REFORMAT A USB DRIVE ON A MAC CAN NOT UNMOUNT MAC OS X#
#HOW TO REFORMAT A USB DRIVE ON A MAC CAN NOT UNMOUNT MAC OS#
#HOW TO REFORMAT A USB DRIVE ON A MAC CAN NOT UNMOUNT VERIFICATION#

In this case, a resolution of the problem occurs with the Recovery Partition, which comes with all the newer versions of the Mac OS X. The above error may also be triggered due to first Aid or while formatting a non-boot partition.

#HOW TO REFORMAT A USB DRIVE ON A MAC CAN NOT UNMOUNT MAC OS X#

For the older Mac OS X like 10.6В or earlier, the opportunity lies in a SuperDrive and a bootable DVD, and this can also offer the same resolution. Therefore, a bootable thumb drive was a good option. The errors could have been unresolvable without a boot drive. The above steps offer a resolution of the problem.

The original task which was halted due to the above error was performed again.

#HOW TO REFORMAT A USB DRIVE ON A MAC CAN NOT UNMOUNT VERIFICATION#

Verification of the Disk is done with the вЂњFirst Aid.вЂќ.It is the Utilities Menu for the Installer Disk Disk UtilityВ is accessed through the Boot menu.The OPTIONВ key is held during the booting and then the attached boot drive is selected.The USB boot driveВ is attached to the Mac, and the system is rebooted.But, the important point to remember is that the installer or the recovery drive must reside in the drive, separate from the primary boot disk with the installed OS on it. Any OS X boot drive is needed to complete the task. This is the most recommended method to repair the error. Note: Stellar Partition Manager is compatible with OS X 10.6 вЂ“ macOS Sierra 10.12. Further, the Stellar Partition Manager utility will allow the user to create, resize, add partitions on the hard drive with HFS, HFS+, FAT or NTFS file systems. Formatting the hard drive or partition scheme will recreate a new HFS file structure on the hard drive, which will be free from cryptic errors. If the OS X is denying you to format, erase and repair the Mac hard drive or a volume due to the CouldnвЂ™t Unmount DiskвЂ™ Error then useВ Stellar Partition ManagerВ to format the hard drive with Mac OS X Extended Journaled file system.

Fixing with Stellar Partition Manager Software There are threeВ means of resolution of the problem.

The one and only requirement are that Disk Utility must reside on the drive. The version of the OS X does not matter, by at least must be 10.7, 10.8 and 10.9. Disk Utility can be run from the external drive. Using an external drive or OS X Recovery for the starting up of the Mac from another bootable drive. There are many solutions when the user faces these problems. If the internal drive is causing the issue because the OS X RecoveryВ exists as a partition on the physical disk, unable to modify or unmount the internal drive, then the preference must be given to a network drive or an external drive. The reason for this error is the modification of the boot drive, or it is being used by some other process or application. The error occurs in such situations like formatting Mac as well as partitioning and verification and repairing of Mac disk. вЂ Disk Erase failed with the error: CouldnвЂ™t unmount disk.вЂ™ The error, which is thrown, is the:Дisc erase failed couldnвЂ™t unmount disc.вЂ™ Even the Network deployment tools like AppleвЂ™s Netinstall service or the DeployStudio fails, on account of this error. They are unable to erase or partition the drive. The user often experiences a problem, while handling some of the Macs, when they are not allowed to repair permissions or directory in Disk Utility.

#HOW TO REFORMAT A USB DRIVE ON A MAC CAN NOT UNMOUNT FOR MAC#

Take a free trial of Stellar Data Recovery for Mac to see how it can actually help you in various data loss situations. So, we recommend you to have a Mac data recovery software by your side to get back the lost data. Due to unmounting error, there could be chances of data loss. In this blog, we will try resolving the вЂcould not unmount the diskвЂ™ error and discuss the best possible manner of solutions for Mac users.

How to reformat a usb drive on a mac can not unmount