11

It is 100% fixable by rebooting my Mac. It is also 100% annoying when I have to do that. After the reboot I can use Sidecar wirelessly very reliably. Until I disconnect. Or change any Sidecar setting (Like: Show touch bar on/off). After that there is a good chance I have to reboot my Mac for it to work again.

  1. Why does it do that?
  2. How do I temporarily fix that? (Say: Is there a terminal command?)
  3. How do I permanently fix that?
14

I found that if you go to display preferences -> arrangement -> tick and then untick mirror display option it will work but I would have to repeat this step every time I use sidecar :)

4
  • 3
    This seems to work for me, too. Hopefully, this will be fixed in the next update. – landonepps Oct 8 '19 at 19:59
  • Works for me too, what a relief! – George Oct 25 '19 at 9:24
  • Genius, thanks for stopping me from pulling my hair out before I go bald – Rob Boerman Mar 22 '20 at 11:47
  • 100% the fix, stinks but better than nothing! – Alex Mar 31 '20 at 17:32
2

when you try to reconnect sidecar, you can click mirror display after connecting your iPad.After that, you will find your iPad get bright.Then canceling mirror operation.

2

Toggle mirror displays on and off by pressing command-F1 twice.

1

In case you have multiple displays connected (and one of them is iPad), toggling mirror off/on was not working for me. What helped was to disconnect other displays and then try toggling mirroring tricks when only the iPad is connected.

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