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Thunderbolt display 27" not working on catalina and macbook pro 16"

I recently bought the thunderbolt display and I am using it with thunderbolt 3 to 2 adapter (original apple). When I plug it into the display nothing happens.

I am using Catalina 10.15.6 on macbook pro 16"


I tried to connect it to an old macbook running older version of macos having a thunderbolt 2 port the display works fine which proves that the display is working but when afterwards when i connect it to my macbook (using the adpater) it magically starts working until i shutdown my mac and check it the next morning it doesn't wakes up.


So i believe it somehow gets triggered when i use it on older mac.

I have repeated this a couple of times and it works fine.


I believe there is a problem with the macos Catalina.


Any solutions?


MacBook Pro 16″, macOS 10.15

Posted on Aug 16, 2020 1:38 AM

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Posted on Aug 16, 2020 8:14 AM

With the two connected, do a PRAM reset.

https://support.apple.com/guide/mac-help/reset-nvram-or-pram-mh26871/mac

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2 replies

Aug 16, 2020 9:19 AM in response to woodmeister50

I have already tried PRAM reset as well as SMC reset

But, just tried it again with the display connected but still no response from display :(


isn't it something to do with the os? because i also tried it with another Macbook having a thunderbolt 3 port with Catalina and it doesn't work on it as well but works on the older macbook having thunderbolt 2.

Thunderbolt display 27" not working on catalina and macbook pro 16"

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