Apple Remote Desktop 3.9.3 Not Working Well

New Contributor

Has anyone had issues with ARD 3.9 being extremely unreliable? We have a computer lab of about 30 iMacs running macOS Sierra 10.12.6 where the teacher uses ARD to broadcast her screen, lock screens, and share student screens. None of that has worked well since we moved to Sierra and ARD 3.9. It it hit or miss for connecting to the iMacs and extremely slow with a lot of lag. ARD worked great last year on El Capitan and ARD 3.8.x. All iMacs are on the same VLAN and ARD connects by I. I'm new to to ARD, so any advice or suggestions would be greatly appreciated!