Trying to format an external drive

[mclld]

Here is a screenshot of the error

 

[Audit13]

Message says the disk is in use?

 

[chabig]

Message says the disk is in use?

Try quitting all open apps except Disk Utility. That ensures no running app is using the disk. If it still fails to unmount, something in the System is using the disk. A reboot might stop that.

 

[Audit13]

Try quitting all open apps except Disk Utility. That ensures no running app is using the disk. If it still fails to unmount, something in the System is using the disk. A reboot might stop that.

Hi,

I'm not the person trying to format the drive.

You advice is good and well worth following.

 

[chabig]

Hi,

I'm not the person trying to format the drive.

You advice is good and well worth following.

I was trying to amplify your comment, not reply to it. Obviously I failed. 😞

 

[Audit13]

I was trying to amplify your comment, not reply to it. Obviously I failed. 😞

My bad, and that's on me!

 

[Fishrrman]

OP:

Are you trying to reformat a partition on the drive
or
Are you trying to reformat the ENTIRE drive?