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Yesterday i tried to reach somebody from Apple "business support". Booting MacMini 2018 with Catalina 10.15.3 installed -> screen visibleĪgain, this still is an issue with macMini2018 and HDMI, Apple needs to fix this. Connect Display using Apple Thunderbolt to HDMI Adapter and Apple HDMI to DVI AdapterĢ. disconnect and reconnect HDMI display (using Apple HDMI to DVI adapter) -> login screen visibleġ. Booting MacMini 2018 with Catalina 10.15.3 installed -> blank screen on HDMIĤ. Connect Display using Apple HDMI to DVI Adapter to macMini2080Ģ. Thunderbolt display is always working, but i have none to test.Īpplying macOSUpdCombo10.15.3.dmg did not help.ġ. Internet Recovery -> install Catalina 10.15.2 -> HDMI ok Internet Recovery -> install Catalina 10.15.1 -> HDMI ok New logicboard in Mac mini 2018 with Mojave 10.14.6 -> HDMI ok Update to 10.14.6 supplemental update -> HDMI fail New mac Mini 2018 with Mojave 10.14.5 -> HDMI ok I found, that the SECOND update on a fresh logicboard breaks HDMI on a Mac mini 2018. Today i upgraded to Catalina 10.15.3 and the #macmini2018hdmigate is back again.Īfter all this trouble with two logicboard replacements and support chats and support calls

Then i have started internet recovery to install Catalina 10.15.2 and HDMI was still working.

I got my Mac mini 2018 back from Apple partner yesterday. The new logicboard always came with Mojave and it broke after upgrading to Catalina. My Mac mini 2018 has now the third logicboard. The only permanent solution today is to go back and stay on Mojave 10.14.5 on Mac mini 2018 as long as Apple is able to fix this. Mac Mini 2018 -> no HDMI after OS Upgrade is a known problem.Īpple support confirmed to me today that they know that and are working on a solution.