Today I fired up my Maverics test drive (A WD Edge) and without much caution, decided to make the first clone from the iMac 13,2 (also running Maverics). The WD has the 10.9 system I used to test the GM. About a minute into the clone, I wondered if perhaps I should check Shirt Pocket to be sure it would work, but it was too late so on with the process. I have a second clone drive, so no worries It took a little longer in smart mode, but it boots just fine. Seems to be OK. The first boot was slower than normal. Pesky Indexing. Now, I don't want to encourage anyone to think it's OK for any system without Shirt Pocket's approval, but it worked here. Super version 2.7.1 (latest) iMac 13,2 (late 2012) to WD passport edge (USB3) I checked Carbon Copy Cloner's site and they are not reporting anything ready yet, so I have no idea if you can get away with CCC at this point. Hope the report helps someone.