Thunderbolt 3 to 2 Adapter -- Want to ensure it works both ways

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Thunderbolt 3 to 2 Adapter -- Want to ensure it works both ways

Hey all, simple question but I just want to make sure I've got this right before I order the part.

I have an external hard drive (here) that has outputs in Thunderbolt 3.

My Macbook Pro is a Mid-2015 model that only has Thunderbolt 2 ports.

If I buy this adapter, will it allow me to connect the hard drive to the computer via my Thunderbolt ports? I just want to ensure the conversion works in both directions before I order it - I thought maybe a newer TB 3 device might not mix with an older TB 2 only computer.

Thanks for any help!

MacBook Pro 15", macOS 10.13

Posted on Jun 28, 2019 12:23 PM

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Answer 1

Top-ranking reply

etresoft

Level 9

51,038 points

Jun 28, 2019 12:48 PM in response to RickMcClelland

Easy answer! It won't work.

Edit: Maybe I'm wrong. That is not a bus-powered device. It might work. I know a bus-powered device won't work.

I don't know if that is a good purchase regardless. If you look closely, you'll see that the Thunderbolt version is only slightly faster than the USB3 version. That is because the hard drive in the Thunderbolt version is 7200 RPM vs. 54000 RPM. I think it is the mechanism that is the limiting factor in this case.

I would recommend this device instead: https://eshop.macsales.com/shop/external-drives/owc-drive-dock

You can put whatever drive you want in that, including an SSD. You'll get full Thunderbolt 2 speed. And it will work with Thunderbolt 3.

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Answer 2

Jun 30, 2019 8:54 AM in response to etresoft

Appreciate the insight. Looking it back over, you're right in that the speed probably wouldn't increase that much. I'm just going to keep using the drive with the USB 3 cable. I do like the idea of the Drive Dock, perhaps in the future, so thanks for that too.

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Thunderbolt 3 to 2 Adapter -- Want to ensure it works both ways

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