This article was co-authored by wikiHow staff writer, Darlene Antonelli, MA. Darlene Antonelli is a Technology Writer and Editor for wikiHow. Darlene has experience teaching college courses, writing technology-related articles, and working hands-on in the technology field. She earned an MA in Writing from Rowan University in 2012 and wrote her thesis on online communities and the personalities curated in such communities.
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Starting with macOS Catalina, Sidecar is no longer available to turn your iPad into a second monitor since it was removed in this update. This wikiHow teaches you how to enable Sidecar on macOS Catalina. To use Sidecar normally (like with Big Sur), choose the option from the AirPlay menu in the menu bar at the top of your screen.[1]
defaults write com.apple.sidecar.display AllowAllDevices -bool true; defaults write com.apple.sidecar.display hasShownPref -bool true; open /System/Library/PreferencePanes/Sidecar.prefPane
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