Apple Remote Desktop doesn't start

I've had the same issue on a new 2016 iMac running the latest version of Sierra. Sometimes ARD 3.8 launches fine, other times the app just becomes unresponsive, which after multiple tries, sometimes works.

I've gone into my user's library folder and removed any plists, etc related to com.apple.RemoteDesktop files. Even after all that it still behaves the same.

Something in addition that I've noticed since using Sierra with ARD is the inability to use the "Change Client Settings..." options in ARD. After trying all various combinations of options within that area, I always end up getting the error message from ARD, "An unexpected error occurred: the required components were not found. The Application appears to be installed incorrectly." -- this after a few attempts at reinstalling from the AppStore with the afore mentioned procedures.

Someone made the good suggestion that Apple does not monitor these threads and to post issue on Apple Bug Reports which I did and a few days later the issue was Closed by Apple as it was determined it was a duplicate bug to another report and provides no info as to a fix or that they were working on solution. Not to happy with that response.

"Apple Remote Desktop doesn't start" is a bit vague. May be you experiment the same issue than I do.

What I noticed is that Remote Desktop.app hangs when launched if I have switched users. Its main window doesn't appear. Force quitting it does not help.

Remote Desktop works flawlessly until if you quit it then switch users, the next launch may (will) hang.

The workaround I have found is this (requires to be administrator):

Launch Terminal, then type:

sudo pkill -u -2 ARDAgent

and type your password as requested.

Then, Remote Desktop.app will launch (or, if launched and hung, its main window will appear).

YMMV

That fixed the issue I was having this morning, thank you!

Did you resolve this problem. I have the same problem. Can't launch ARD

This did not resolve my issue of not being able to 1st launch ARD and now re-install it.

Sounds good. I'll do the same on my account. Who knows maybe the squeaky wheel will help accelerate a correction.

Issue was resolved with latest release of latest version of ARD 3.9

Absolutely worked for me - thanks!

pkill -u -2 ARDAgent