first aid volume could not be unmounted imac

Wondering ' why my external hard drives won't mount on Mac'? This post explains the reasons and teaches how to fix this disk problem without losing data. Knowledge Base: What does 'Mount' mean on Mac? Why can't mount the external hard drive on Mac? Fix external hard drives not mounting on Mac Dos and Don'ts When External Hard Drive Not Mounting on Mac Recover data from an external hard drive that won't mount VOLUME COULD NOT BE UNMOUNTED MAC FLASH DRIVE HOW TO FAQs about external hard drive not mounting up on Macĭos and Don'ts When External Hard Drive Not Mounting on Macīefore you go further, it's better to know what you can do and can't do.ġ.

Do not go straight to reformat this not-mounted external drive unless you've restored data from it or backed up it before. Reformatting will wipe the data on this disk and cause serious data loss.Ģ. Do not run First Aid to directly repair the disk if you didn't restore data from it or back up it.

VOLUME COULD NOT BE UNMOUNTED MAC FLASH DRIVE HOW TOĪny further operation is very likely to overwrite your original files and make them unrecoverable.ģ.

Back up as many of your files as possible, reformat the disk, and restore your backed-up files.

If you have any idea to get the HDD working or even safe the files, I would be really grateful.Īlmost forgot about this from Disk Utility:ĭisk Utility can’t repair this disk. This was the try: $ sudo diskutil eraseDisk JHFS+ DISK_VOLUME disk1īut it didn't work as well.

Than for each disk: $sudo diskutil unmount force disk1snīecause I wasn't able to do anything with my external HDD I made a desperate attempt to erase everything on it, including unbackuped files, cause this used to be the backup plan. Gave this: Forced unmount of disk1 failed: at least one volume could not be unmounted If I open it in disk util I sometimes see an actual name of a partition, but most likely it's not the real name.Ģ: Apple_HFS Macintosh HD 140.0 GB disk0s2ģ: Apple_Boot Recovery HD 650.0 MB disk0s3Ĥ: Microsoft Basic Data BOOTCAMP 110.1 GB disk0s4Īnd then to unmount this: $sudo diskutil unmountDisk force disk1 My 1TB LaCie Rugged THB decided it was a good idea to stop working all of a sudden.

First aid volume could not be unmounted imac