View Full Version : Cloned computers, failing and slow login

Aug 20, 2013, 12:25 AM
When using CCC or Disk Utility to clone a Mac HD of one new iMac to another, over ThunderBolt, we are getting I/O errors. Even though the clone fails, the destination system does boot and log in, however, the logins take a very very very long time.

Aug 21, 2013, 07:16 PM
It looks like cloning via Thunderbolt does not work. We tried multiple iMacs and multiple cables. In the end we used external USB3 hard drives as Master Images. Worked flawlessly.