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User profile for user: hazmi
hazmi Author
User level: Level 1
4 points

MacBook Pro 2017, 13", Big Sur 11.6, Did Not Work With Apple External Monitor

I connect the monitor using the USB-C to Thunderbolt adapter. It only work for less than 30 seconds then the monitor goes black. The 'Displays' in System Preferences also shown that it is totally disconnected. I tried turn off the monitor, re-connect the adapter to my MacBook, same thing happens - the monitor connects for about 30 seconds and then poof.. it disappear!


If i connect other brands' monitor using HDMI (adapter) it works superbly! Its seems that a Mac DID NOT work with a Mac! What should i do???

MacBook Pro 13″, macOS 11.6

Posted on Sep 29, 2021 11:19 PM

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User profile for user: Luis Sequeira1
Luis Sequeira1
User level: Level 9
64,538 points

Posted on Sep 30, 2021 2:46 AM

Which Apple display is this? Thunderbolt Display?

I suppose that you are using the Apple Thunderbolt3 to Thunderbolt2 adapter,

and the cable that comes with the display, right?


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MacBook Pro 2017, 13", Big Sur 11.6, Did Not Work With Apple External Monitor

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