I have a Mac Mini configured just the way I like it with 10.10.2 installed. I need to deploy that to a bunch of other computers around campus. The usual process for me in the past has been to use an external USB drive, with OS X installed, to boot the target Mac and capture an image. That really doesn't seem to be working in Yosemite. I can boot to my 10.10.2 USB drive and run Disk Utility, but odd things happen when I try to create an image. When I try to image the partition, OS X doesn't dismount the target partition/disk. In past versions of OS X, the target partition was immediately dismounted after I entered my password. Lastly, I cannot "scan the image to restore", that part fails even though I can successfully create the image file. The error message is: Unable to scan "image.dmg" (internal error). Has anyone else seen this? I've tried making several images already.