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MacBook Air screen stays black with external monitor (macOS Catalina 10.15.4)

Rivanov

Rivanov

macrumors 6502a
Original poster
Dec 28, 2010
526
574
Netherlands
When I connect my new MacBook Air to an external display (USB-C Hub to HDMI) the MacBook screen stays black. The external display works but I can’t set second screen. Running macOS Catalina 10.15.4. Anyone with a solution?
 
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