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I have a MacBook Air 13-inch, 2018. I updated the software to Mojave 10.14.5 and the laptop has stopped recognizing the external monitor after the update. Is there a way out of this mess?

  • Please add a comment with the brand and model of the external monitor and describe the cables/adapters that you use to connect. – IconDaemon May 31 at 18:41
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I've hit the same wall with both my old and new Mac Minis when I upgraded to 10.14.5 this week. They're both ok with the HDMI cable to the monitor (so at least one is useable), but don't play nice with the HDMI/VGA adaptor/cable that I've also used to enable a second feed to the screen.

Screen sharing between them is the only workaround, and I note this an issue with Mojave that pre-dates 10.14.5 (such as here https://discussions.apple.com/thread/8625812 and here https://forums.macrumors.com/threads/no-signal-on-external-displays-after-mojave-update-2018.2128056/).

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