• 3.0 out of 5 stars

    21.5 iMac Late 2015 experience with this product

    • Written by John W from Lakewood

    I have an OWC external drive enclosure with a 4TB platter drive that works just fine plugged into a USB3 port on my iMac and the USB3 port on the drive enclosure. The external drive enclosure also has an eSATA port and my iMac has 2 Thunderbolt 2 ports that have never been used. I purchased this product to see if I can get a speed increase using Thderbolt to eSATA. My computer recognized the Kanex adapter but would not power up the external drive and thus Disk Utility could not see the drive. A visit to the genius bar solved the problem. More power was needed. The Kanex is bus powered and the external (down stream) drive is bus powered. I guess not enough current makes it through the Kanex to power my particular drive. I supplied 5V to the external drive and it works. It is faster than USB3 on my computer. A CCC backup of 1.33TB would take 15 minutes or so via USB3 and the Thunderbold 2 / eSATA backup took under 9 minutes. That is not transferring all of my data; just the changes that CCC detects.

  • 2.0 out of 5 stars

    Can't boot off the drive connected through the Kanex adapter.

    • Written by ROGERS S from Sarasota

    I can't boot off the external drive connected through this Kanex adapter to my 2012 iMac (with USB 2.0). I bought this adapter because my internal SSD failed (for the second time) but it's useless as a workaround for that. I just wasted $80.

    I wish I had been warned on the Apple web site where I bought it that it can't be used for this purpose. Yes, this warning is buried on the specs page of the Kanex web site, but it should be prominent in the information page on the vendor page where it's sold. When you buy a product, you don't read the fine print on the manufacturer's specs page on a different web site looking for a warning that it might not perform as expected.

    10 of 14 people found this useful

  • 5.0 out of 5 stars

    Connected to Apple iMac with Vantec HX4R and worked fine.

    • Written by Paul E from Port Coquitlam

    I have a Vantec HX4R (4Bay Drive Enclosure, 2 drives installed, eSata Bus Multiplier) worked fine with USB 2 but would drop its connection with USB 3 when transfering files, tried multiple cables, but just would not work properly with USB on multiple computers. So I ordered this adapter, to give it a try. Connected it up to my iMac and HX4R using a Lacie eSata cable, and the 2 internal drives showed up fine on 1st boot. Copied all files from my 1st Drive in the HX4R to the 2nd Drive (also in the HX4R) and no errors.
    Using a program call SMART Utility all drives were seen as if part of the computers main data bus, and reported as good, which was a pleasant supprise since most external drives are not seen by the SMART Utility.

    11 of 12 people found this useful

  • 1.0 out of 5 stars

    Worked fine for a week, then it would heat up and not connect anylonger

    • Written by Paulo M A from Rio Claro

    Got the device on pre-order by Kanex website. Worked fine for about 3 months, which I only used weekly for backups. Then it started disconnecting randomly in the middle of writing/reading hard drives, and damaging its sectors. It would not connect with system restart, it would show nothing was connected on the thunderbolt port. Not even a USB flash drive would connect there. Tried in other macs from friends, different versions of the OSX, and still same thing. Cheap made, expensive adaptor, not worth it at all. So it was a waste of money... Kanex wanted me to send the device back to them (from Brazil) at my own expense! So I sent it to the trash.

    13 of 14 people found this useful

  • 1.0 out of 5 stars

    Had major issues

    • Written by Paul S from Kilgore

    I bought this product to get usb 3.0 on 2011 MBA. Plugged it in and it found the adapter just fine. Plugged in my external ssd to usb port worked fine. Configured network and plugged in the network cable and bam. No more external drive. Unplugged network nothing. I plugged in my external usb 2.0 port and it worked but was spotty on recognizing external drives. My external 1tb drive worked sometimes in the usb port. Ethernet worked great but I needed it for usb 3.0. It did not perform or work as I expected. I sent it back. Guess I will try a dock or something else.

    28 of 34 people found this useful

  • 4.0 out of 5 stars

    Works like a charm here

    • Written by David S K from Brooklyn

    I've had the Kanex Tbolt to USB3-eSATA adapter for three months. It has worked pretty much exactly as I hoped it would, as a way to get USB3 speed and access USB peripherals with older MBPs that don't have it. As far as problems with dismounting or waking from sleep I've had enough similar issues with all manner of Thunderbolt docks in this regard, and problems with a MBPs state after waking from sleep with neither USB3 or Thunderbolt in the equation, not to mention less than perfect behavior with native USB3 ports on MBPs, specifically 2012 and 2013 models. So I hesitate to point the finger at the adapter when something happens. That said, weird stuff basically never happens. I have no need on the Macs I use it on for the audio or video functions of more expensive docks, so the only problem was waiting so long for such an adapter to appear. I swap it between MBPs easily, usually going into a hub which connects multiple storage devices, and I've never had a problem with large transfers or with several processes going on at once through it. It has been no more troublesome than any other part of my chains. Wish it was $45 instead of $80, but what can you do.

    44 of 50 people found this useful

  • 1.0 out of 5 stars


    • Written by David K from San Francisco

    I have experienced issues similar to others I've read about. The adapter seems to have a hard time staying connected to the Thunderbolt bus for long periods of time if under any transfer load whatsoever. The effect is a great deal like yanking your drive array's cable out of the back of the computer in the middle of reads and writes.

    It's a flimsy, cheaply-made device, and I suspect that some lots of these are better manufactured than others. But I don't think I'm going to trust my data to another one and hope I get a good lot.

    67 of 74 people found this useful