What to do if an external hard drive is recognized on one macbook pro but is NOT recognized on another?
Attached a friend's external hard drive to my MacBook Pro and it wouldn't mount (Finder is set to show external disks), though I could clearly hear it functioning. However, if it's plugged into his Mac, it is recognized.
Thanks in advance for any solutions and apologies in advance if this has been a topic before.
MacBook Pro, OS X Mavericks (10.9.5)