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Officially, the late 2012 Mac mini will support two monitors in the following combinations: one HDMI monitor while using one Thunderbolt monitor two Thunderbolt monitors. As for the supported resolutions, the late 2012 Mac mini supports up to 2560 x 1600 on Thunderbolt monitors or up to 1920 x 1200 on HDMI monitors. Of course the above is the official ...


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I suggest getting high-quality USB-C to HDMI cables. You should never see link retraining messages unless your cables are flaky. I've had great luck with these: https://smile.amazon.com/gp/product/B073YPBWKB/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 I run 4 4K monitors off my 2017 15" MacBook Pro, 2 from each side, one goes through an OWC ...


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Had similar issues for awhile, resolved via... Changing combination of adapters / cables / ports as underlying ASICs (Application-specific Integrated Circuits) seemed to have different preferences / properties / thresholds. Disabling 'Energy Saving' / 'Eco' / Etc. mode on connected displays. Connecting displays to non-'eco controlled' (master / slave) ...


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The 2017 MacBook Air does not natively support dual external displays. When you connect a monitor through the mini-DisplayPort, you'll only get a single display. Even when using the splitter - you'll always get a single display mirrored across both monitors. The 3-in-1 mini-DisplayPort adapter is meant for converting the DisplayPort signal to one of three ...


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I was having this problem, too. What I found is that when mirroring the displays the external keyboard adjusts brightness on both computers. When NOT mirroring the displays the keyboard on the primary Mac (in my case a Macbook Pro) adjusts the it's own display and the external keyboard connected to the MacBook Pro adjusts the iMac display. I am running ...


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