Disk in use by application

Joined
Sep 25, 2015
Messages
396
Reaction score
10
So I try to unmount a disk, and it comes back with the error that it can't do that because some application is using it. You can force eject, but you are warned that that can compromise the data on the disk. OK, so I close all applications, try again to dismount, and I STILL get the error. OK, so I relaunch Finder to let the machine screw it's brain back in and I STILL get the error. Now, I had just backed up onto that disk with SuperDuper, so I just forced an eject, and backed up on it again. After that second backup, it ejected fine. Um, why? If all applications are closed, how can an application be using that disk? More to the point, how do you dismount a disk safely if it refuses to do so?
 

Cory Cooper

Moderator
Joined
May 19, 2004
Messages
11,102
Reaction score
492
Hello,

I have had that happen from time to time. Normally, if you await a minute or two, you can safely eject it. Sometimes if it stays that way, I restart, then I can eject it.

Since you just performed a clone, I would lean towards Spotlight re-indexing the drive possibly, causing it to be "in use".

C
 
Joined
Sep 25, 2015
Messages
396
Reaction score
10
I hadn't thought about Spotlight. Good point. In which case, I just have to wait it out.
 
Joined
Jul 29, 2015
Messages
30
Reaction score
0
You could try System Preferences - Spotlight - Privacy and then drag the drive icon to the window. That will prevent Spotlight from indexing the drive, assuming that does not matter to you.
Also; to be certain of the cause try searching the internet for the free app 'What's Holding Me', it will tell you what is using the drive.
I hope this helps.
 

Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments. After that, you can post your question and our members will help you out.

Ask a Question

Top