The message pops up. Rebooted the mac 3.
How To Use Unsupported Thunderbolt 3 Docks And Enclosures
Cannot use thunderbolt accessory macbook pro. Copied and pasted the code that goalque has provided. This message implies that i have connected the accessory imac using a non thunderbolt port on the macbook pro. Why do i see cannot use thunderbolt accessory. A single usb cthunderbolt 3 port can become power usb a ports an sd. Choose apple menu restart. I have a 2017 macbook pro connected via an apple usb c to thunderbolt adaptor to a thunderbolt hub caldigit thunderbolt 2 compatible.
If i plug it into a certain one of my four usb c ports i get the cannot use thunderbolt accessory notification. The message i get is the thunderbolt accessory can not be used please connect it to a thunderbolt port on this mac. Even using the universal usb c connector for thunderbolt 3 there are still some drive enclosures egpu cases and docks that wont connect to a mac running sierra or high sierra. If the device appears but does not work review the devices documentation for further troubleshooting steps. Be sure that you are using a proper. I have disabled the system integrity protection.
Heres how to. Quit and restart any apps that use the device. Finally consider a thunderbolt 3 dock if youre planning to use the 16 inch macbook pro as a part time desktop computer. I have a similar issue my thunderbolt 3 express dock does charge but no other port can be used i can not connect anything to it. In the window that appears see if the thunderbolt device is listed below hardware in the list on the left. Cannot use thunderbolt accessory connect accessory using a thunderbolt capable cable.
Connect your thunderbolt 3 enabled device to your macbook pro with a thunderbolt 3 cable. Ask question asked 1 year 6 months ago. Mbp 13 with touchbar akitio node enclosure evga gtx 1070 sc. Cannot use thunderbolt accessory. Hot plug in the akitio node via apple tb3 cable. I have a new 5k imac and an out of the box macbook pro and am trying to migrate data to the macbook pro and my imac reports cannot use thunderbolt accessory whats going on and how can we fix this so i can migrate.
Verify that your thunderbolt 3 device is unsupported by macos.

















