macOS 10.15 Catalina (still beta) now supports running a secondary display using an iPad!

I was disappointed to realize that it does not support for my old MacBook early 2015. I was running an iPad Mini (5th generation 2019), but I know the problem should be due to the MacBook which is driving the display.

But I got it working!

My 2015 MacBook + iPad Mini


It turned out that Sidecar is being hidden for some older hardware, and with some simple overriding of the defaults, we can make it show.

Open your iTerm/Terminal and give these commands:

defaults write hasShownPref -bool YES
defaults write allowAllDevices -bool YES
open /System/Library/PreferencePanes/Sidecar.prefPane

Error on my first attempt


On my first attempt, it throws me that error. But perhaps due to a reboot, the Sidecar shows up mysteriously the next day. So don’t panic if it didn’t work at first.




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