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ersoyp Author

Level 1

4 points

After the update, external displays are just weirdly mirroring main display via showing only black screen.

1 hour passed since I've updated to most recent Catalina. After the update two external monitors started to act strange. When i swipe in the macbook they also swipe but they are just showing black screen. All the fullscreen in macos also available on external monitors but only the active screen is showing the application, externals are not.

When relocate menu bar to another display - then it becomes active and only that display is controlling other two while those two are showing just black version of the main display's application.

MacBook Pro 13", macOS 10.14

Posted on Mar 28, 2020 3:39 PM

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ersoyp Author

Level 1

4 points

Posted on Mar 28, 2020 4:42 PM

After searching and applying several suggestions, i found out that; after the update "display have separate spaces" checkbox is unchecked. When i checked, it is fixed.

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After the update, external displays are just weirdly mirroring main display via showing only black screen.

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