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It looks like Apple dropped support for Apple Thunderbolt Display and brightness can’t be adjusted OOB. I use this app to control brightness of my external monitors: https://apps.apple.com/ua/app/display-brightness/id1603899734?mt=12 Btw, it also can control other displays too


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M1 Mac can have only one native external display connected. However, it had been improved with M1 Pro Mac and M1 Max Mac systems(released after 10/2021. The new M1 Pro or M1 Max Mac systems can support up to 6 external monitors at the same time totally. I had tested and proofed this new video supported capacity with the new M1 Pro/ M1 Max accordingly. I ...


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My testing cases showed the monitors with a built-in KVM switch function will have many issues with your setup profile for I have 100% same hardware profile as yours (M1 Mac Mini and 2019 MacBook Pro 16 -the intel-based). I recommend using an external KVM switch solution for your setup profile. Pick any DisplayPort monitor without built-in KVM switch ...


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In addition to the comments, to address the "Everything goes okay unless I do step 8, at which point the macOS will not boot, I get a message like '...was restarted because of a problem...'" issue, you have to make sure the csrutil is enabled and authenticated-root is actually DISABLED. I made the mistake of enabling both after all the steps.


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Yes, both the 2020 M1 Mac Mini and the 2019 16" MacBook Pro supports DisplayPort Alternate Mode. All Thunderbolt 3 ports (as those on those Macs) supports USB-C Alternate Mode for DisplayPort. Note that often I see that monitors with built-in KVM have non-obvious drawbacks or "things that might annoy you". You need to think your use case ...


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Two displays from one DisplayPort connection requires "multi-stream transport", and Apple does not support this. https://en.wikipedia.org/wiki/DisplayPort#Multi-Stream_Transport There are video adapters from DisplayPort to two HDMI ports, and these would be supported by Windows and Linux but not on macOS. I've come across people on the internet ...


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I found an excellent blog that answers your question: https://danielcompton.net/2021/07/28/apple-m1-displaylink-multiple-display Since links like to go dead on the internet I'll try to summarize the one and only option you have. That option is DisplayLink. That doesn't mean you have only one product that will solve your problem, it's that every product ...


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