Script to unmount or eject disk images

Question

Is there a way to unmount disk images wiuth an automator or applescript? I have such a script to eject all disks, but this won't unmount disk images. I would like something that unmounts everything, except of course the startup disk etc.

Answer 1

Andrew Gara wrote:
That works!
However, I still have the problem that it will only eject 1 of 2 or 2 of 3 or 3 of 4 etc. I always have to run the script again to eject the remaining disk or image.
It says: Applescript error Finder got an error. Can't get disk 3 (or whatever is remaining.)
I really appreciate your help btw.
this of course makes sense because once a disk is ejected it's not counted among the remaining disks. we should start ejecting from the last disk (see the script below). Also, as i found out, Finder's eject command in apple script doesn't unmount internal drives. At least it didn't for me. I' not sure what the story here is.
One can circumvent this by calling a shell script command.
Something along the following lines.
tell application "Finder"
set nmd to number of disks
--this ejects externals and disk images
if nmd > 1 then
repeat with i from 2 to nmd
eject disk (nmd - i + 2)
end repeat
end if
--this ejects internals except for the start up
set nmd to number of disks
if nmd > 1 then
repeat with i from 2 to nmd
do shell script "diskutil unmount /Volumes/\"" & (name of disk (nmd - i + 2)) & "\"> /dev/null &"
end repeat
end if
end tell
I tested it on my computer and it ejects 10 disks and disk images well so I think it should work ok most of the times but there are probably situations when it will fail. I'm not sufficiently motivated to refine it.