[kevs]

Says my disc image is in use. But it's closed and not in use. what gives?

[hoopz]

Are there any apps open that were launched when clicking on anything in the disc image (eg, TextEdit if you clicked a Read Me file)? If so, you may need to quit them.

[kevs]

Yes, I use apps to lauch the photos in there. thanks. Just dont get though why an app that was used for that would tie up ejecting it, since I'm don't with the photo. the photo is closed out.

[Dog Like Nature]

Fire up Terminal and do the following:

Code:
mount

Find the /Volumes entry for the volume you wish to quit, and make a note of the /dev/disk value (for example /dev/disk1s2).
Now type

Code:
lsof /dev/disk1s2

to determine any programs that may still be using the volume. You can now kill the processes that are using it, and then be able to unmount it.

Here's an example:

Code:
$ mount
/dev/disk0s3 on / (local, journaled)
devfs on /dev (local)
fdesc on /dev (union)
<volfs> on /.vol
automount -nsl [184] on /Network (automounted)
automount -fstab [200] on /automount/Servers (automounted)
automount -static [200] on /automount/static (automounted)
/dev/disk1s2 on /Volumes/Skype (local, nodev, nosuid, read-only, journaled, mounted by me)

Code:
$ lsof /dev/disk1s2
COMMAND   PID     USER   FD   TYPE DEVICE SIZE/OFF  NODE NAME
Finder  10497 me   15r  VDIR   14,5      102 40132 /Volumes/Skype/Skype.app
ksh     12707 me  cwd   VDIR   14,5      204 40133 /Volumes/Skype/Skype.app/Contents
vim     12728 me  cwd   VDIR   14,5      204 40133 /Volumes/Skype/Skype.app/Contents

The offending processes (in this case, vim & ksh) can be killed with:

Code:
kill 12728
kill 12707

or, if they fail to go quietly into the night use:

Code:
kill -KILL 12728
kill -KILL 12707

The volume can now be unmounted.

[Phil Sherry]

...or just log out/in.

[Appleman]

Just quit all open apps.

[kevs]

Ok, I get it, but just curious: again:
why quit all apps, when everything is closed out. just curious thats all. thanks!
case solved.

[Appleman]

Originally Posted by kevs

Ok, I get it, but just curious: again:
why quit all apps, when everything is closed out. just curious thats all. thanks!
case solved.

If all apps are closed, items cannot be in use so the disc should be ejectable.

[kevs]

right got that.
but what I'm saying is that I think everything is closed out. unless I'm wrong.

[hoopz]

Just to be clear about this, kevs: did quitting the applications in question solve your problem?

If so, and in answer to your most recent question, I might hazard a guess that when an app is opened as a result of double-clicking on a mounted volume, that app might be somehow bound to that document--perhaps memory space might be continued to be allocated to it?

I dunno; I don't really know about these things so much as know of them, so a correction or clarification by someone more knowledgeable than me would be most welcome.

[hoopz]

In any event, I wish the dialog box could be more informative/powerfull, eg:

This file is still in use by (App in question)

[quit and delete]

[show Application}

[cancel]

[Appleman]

Originally Posted by kevs

right got that.
but what I'm saying is that I think everything is closed out. unless I'm wrong.

Have a look with Activity Monitor in Applications -> Utitlities.
You can see exactly what is running and what is not.

[kevs]

Thanks yes, problem solved.

[Appleman]

Originally Posted by kevs

Thanks yes, problem solved.

And what was the problem? (lessons to be learned for the rest of us???)

[alphasubzero949]

Probably an app using the image was open.

[kevs]

"using" is the key word. It's not using it anymore. yOU know, I definitely think I'm seeing this lot more than before.