External Toshiba drive won't work on Mac after using on PC

Question

Level 1

0 points

External Toshiba drive won't work on Mac after using on PC

My Toshiba External USB drive stopped working on my Mac air after I downloaded some files on a PC. It worked numerous times on the PC and then I brought it back home to use on Mac. Now, it won't show up on finder but can be found on Disk utility. I cannot manually mount it there. Repair disk and verify seem to finish but still won't mount. It was originally formatted as Mac OS Extended (Journaled). The PC did not prompt me to re-format or do anything to the Hard drive.

How can I get it to work on Mac again?

Thank you.

MacBook Air, OS X Mavericks (10.9.5), null

Posted on Mar 27, 2015 3:51 PM

Reply

Answer 1

Brett L

Community Specialist

Mar 30, 2015 2:51 PM in response to haynechi

Good day haynechi,

If your external hard drive will not mount on your MacBook Air but it will show up in Disk Utility, you may need to erase the hard drive in order to get it to show up on the Mac again. NOTE - this process will destroy any data on the drive, so be sure you have anything on there backed up somewhere else before you begin!

Use the steps in this article -

Disk Utility 12.x: Erase a disk, CD, or DVD

Thanks for using Apple Support Communities.

Safe computing,

Brett L

Reply