My Book 1TB Drive No longer mounting. PLEASE HELP!

WD External and Portable SSD External SSD for macOS
1

My drive only has USB2. I have always plugged it in and the hard drive icon appears on my desktop of my MacBook Pro running Leopard 10.5.8. However, the drive does not appear anymore. It does not appear in the finder, but can be seen using disk utility. I have tried restarting my computer, trying different USB ports, and nothing seems to work.

When I plug the drive into my girlfriends computer (10.6 Snow Leopard), the drive shows up and works fine.

I have tried everything I can think of to get the drive to work on my computer again, but nothing seems to work.

How can I fix this? I really can’t let this drive go to waste.

Thanks for any help.

2

The fact that the drive works on a different computer proves the drive is still usable, In your case, I would try a different USB port in the computer, also try to run FirstAid on the drive from the Disk Utilities, as a last resort I would run all the latest updates available for the operating system on Apple’s website.