Summary: I am running Mac OSX 10.7.5 using the Backup Plus 1Tb and Backup Plus 3Tb which I connected using a USB 3.0 port and, with the Seagate Thunderbolt adapter, the Thunderbolt port. I could read and write to the drive using USB but could only read when using the Thunderbolt port. It was frustrating but here is a fix that worked for me. The drives need to be formatted as ‘Mac OS Extended (journaled)’ and the partition map scheme needs to be ‘GUID Partition table’.
BOOTABLE on Mac but Beware the Extra Seagate Driver for Big Drives
G. Kuo, Amazon
12 March 2013
Summary: This desktop Seagate Thunderbolt adapter has been praised for its usability with drives other than just the Seagate goFlex encased drives. Indeed it is true, you can attach bare external drives if you also arrange for some physical support for the drives. That's already covered in other reviews. A few things I've verified with my Thunderbolt desktop adapter are interesting. 1.
Fast and daisy chains, but iffy value proposition and no cable
Indy Reviewer, Amazon
12 March 2013
Summary: The Seagate Backup Plus Desktop Thunderbolt Adapter is a specialty device for users who don't have a USB 3.0 connection, who want to daisy chain multiple drives, or who want to do substantial video capture and transfer. A star off for not including a cable along with an interface that's not really necessary for the actual Backup Plus hard drive leaves this at 4 stars.
Summary: When I received the Thunderbolt interface I had already been using my 4TB Backup Plus drive for a few days with the USB 3.0 interface. Reading the (minimal) documentation told me that I had to install a driver to be able to use the drive with both USB and Thunderbolt I thought that might be a likely occurrence so I installed the driver and restarted my iMac as required. When the system was back on line I attached the interface to the drive and then connected it.
Seems priced for the market, based on what it does and doesn't have
Dave "Dave", Amazon
25 February 2013
Summary: Taken in a vacuum, I wouldn't be impresssed by this device, but if you look around for Thunderbolt docks and adapters, the price is reasonable. PROS: 1) Works fine. I have another dock, and I find their performance about the same. I find (as I'd expect) that Thunderbolt is fast enough that I can tell the difference based on the speed of the drive; with slower interfaces the drive differences blur.
Summary: After trying a Pegasus J4 Thunderbolt Drive Enclosure (didn't work at all with a late 2012 iMac 27"; worked on Mac OSX ML on an Option Boot but DIDN'T work at all with Windows 7), I tried the Seagate Backup Plus Adapter, and it worked perfectly in an external SSD setup... with every SSD I threw at it, a Samsung 840 (256 & 500 Gb) and a Crucial M4 256 gb. Also works with HDDs.
Jerry Hatchett "Always on the prowl for a rea..., Amazon
28 December 2012
Summary: This Thunderbolt interface rocks. Immediately obvious that it's far faster than USB 3.0. At this point I'm gonna give it 4 stars instead of 5 because I'm having some flaky problems with it on boot. That may turn out to be a mobo issue instead and if it does, I'll come back and adjust this review accordingly.