Bump ......
Is there no fix for this issue? I've created a .dmg disk before and have tried everything I can think of this time to create another. I did not get the 'Resource busy' when I did it before but it was on Leopard then.
I've closed all apps, rebooted, then opened Disk Utility, and followed the steps. Same thing: Resource busy. I've tried repeating the above steps but creating the .dmg disk by selecting the folder from my backup drive so nothing there could be running. I've trashed the diskutility.plist, cleared items from the Resource Folder (although I assumed 'Resource busy' referred to something in the folder I was trying to copy to the .dmg disk).
I've booted from my Backup HD and tried it all from that side: same result.
Disk Utility sees the .dmg installer disk and the named disk within it. I can repair and mount it, but it's empty. I can copy the folder I want in it, but it's not locked, and won't be. If I try to copy it to my HD from the desktop, it only creates an alias.
I've tried Disk Utility:File:New:Disk Image from Folder, and also Disk Utility:File:New:Blank Disk Image. Same result: 'Resource busy'.
I've read the posts on Apple Discussions and Googled info re: creating a .dmg disk and what 'Resource busy' means and tried any suggestions. I still think my hope for any help is here. :-)