If Apple Remote Desktop shortcuts misbehaves - Try this!
If Apple Remote Desktop shortcuts misbehaves efter security updates - Try this!
Click the menu.
Select Restart...
Hold down command-R to boot into the Recovery System.
Click the Utilities menu and select Terminal.
Type csrutil disable and press return.
Close the Terminal app.
Click the menu and select Restart....
Remove RemoteManagement from Macintosh HD/System/Library/CoreService/
Open SystemVersion.plist (same place as above) and change version to 10.10.6 (remember current version)
Install Apple Remote Desktop 3.8.5
Download Apple Remote Desktop 3.8.5 Client
Open SystemVersion.plist again and change back to current version om your system
Select Restart...
Hold down command-R to boot into the Recovery System.
Type csrutil enable and press return. (Important)
Click the menu and select Restart....
Done!