I’ve been trying to make Sidecar work with my Mid-2015 MBP and 5th Generation iPad but I can’t access the preferences for Sidecar. Searching for “Sidecar” in Spotlight returns a result but clicking on it shows this error in System Preferences
After some digging, i found this thread on Reddit.
Apparently, all we have to do is input
defaults write com.apple.sidecar.display AllowAllDevices -bool true; defaults write com.apple.sidecar.display hasShownPref -bool true; open /System/Library/PreferencePanes/Sidecar.prefPane
in the terminal and it will show Sidecar