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As of 6/14/2021 Apple's Thunderbolt 3 to Thunderbolt 2 adapter is INCOMPATIBLE with ALL MAC PRO (LATE 2013).
Does anyone know of an adapter for TB3 to TB2 that works for our Mac Pro (late 2013)?
We only have USB-A (0.48 GB/s) and TB2 ports (20 GB/s) The peripheral market has already moved on to USB-C or TB3/4.
I'm trying to connect any external HD to T2 ports.
I have LaCie Mobile Drive 5TB External Hard Drive USB-C USB 3.0 from Apple store.*
Thanks for any recommendations.
*After chat with Apple sales they recommended: LaCie Mobile Drive 5TB External Hard Drive USB-C USB 3.0 with Apple T3 to T2 adapter and T2 cable which did not work & several Apple techs later it was found the adapter was not designed to work Mac Pro (late 2013).
Very helpful. Now that I think about it, it sounds stupid not to have considered the HD source data rate limit in the first place. Still I makes me wonder what the whole Thunderbolt/USB-C cable speed evolution is about if HD's can't use it. Or why the apple techs don't include that consideration in their recommendations. Then again, they didn't even know the T3-T2 adapter didn't work on their own MacPro (L2013).
Thanks Grant
The Mac Pro late 2013 feature USB ports that support USB-3.0 SuperSpeed of up to 5 gigabits/sec (500 Mbytes/sec), provided the high speed device is the first or only device connected.
Also, to attain USB-3 speeds, USB-3 wired cables must be used. These have five additional conductors deep inside the connector.
"ordinary" USB has only four conductors and no blue inserts:
.
Any drive you use with this adapter requires its own power source, as the adapter does not pass power either direction.
Also, are you sure you are using a Genuine ThunderBolt-2 cable on the Mac Pro 2013 side. Mini DisplayPort cable is not sufficient.
Yes, I've found the the lack of power conduction after searching to be true. Thank you. Also, I am using Genuine TB2 cable as purchased from Apple after a chat with their specialist who recommended the whole set up. Lacie HD, TB3-TB2 adapter & TB2 cable. At this point I'm left with the USB ports only with this drive. Alternately I could upgrade the internal HD but I'm getting conflicting info on that. One site said 4TB max another 1TB which I'm at now.
At under US$200 for 4 or 5 TB, that drive will be a rotating magnetic drive inside, NOT an SSD drive. As such, it is limited to under about 100 Mbytes/sec steady-state speeds, because the platters do not spin fast enough to produce data at a faster rate, and there will be intervening dead times while the drive does a new seek. Buffered data can produce momentary bursts that are faster, but can not be sustained.
Insisting on a connecting Bus speed faster than that is only fooling yourself -- the drive can not possibly source data steady-state any faster that the platter-spin speed.
what device(s) are you attempting to connect with this adapter?
Yes, thank you. I believe that's my only option here if I keep this drive. Was hoping for TB2 speeds and 4-5 TB capacity.
Thunderbolt 3 (USB-C) to Thunderbolt 2 Adapter DOES NOT WORK WITH MAC PRO (LATE 2013)
