Here is my fix. Takes about 15 minutes once you have everything backed up and copied.
- Quit Apple Remote Desktop
- Navigate to the library folder within the user account you are running ARD.
- Navigate to the Containers folder
- Control Click the folder com.apple.RemoteDesktop and select compress from the menu. Your settings are now backed up
- Move the com.apple.RemoteDesktop folder to the trash can, do not empty trash yet. Consider this file your second backup.
- Navigate to the library > Preferences and select the com.apple.RemoteDesktop.plist file and select compress from the menu.
- Move the com.apple.RemoteDesktop.plist to the trash.
If you launch ARD and you see all of your original setting you did the steps above while ARD was running.
- Launch Apple Remote Desktop
- Click the Agree button
- Enter your workstation Admin password at the prompt.
- Go with Defaults on Report Collection and click Done.
You will be back to the default setting of ARD, and it is now time to repopulate your settings. You should find that all of your clients are now bright Blue and responding, not just the 3.9 ARD clients.
My experience over the years of working with ARD is this app is testy. I approach every update or version change with the mindset that I am going to have to setup my ARD from scratch again. Many moons ago I used to tried many different fixes in an effort to avoid setting up ARD from scratch, but now know that is easier than living with the bugs.
If you have problems with this fix simply quit ARD, remove the aforementioned folder and plist file, then decompress the file and folder, launch ARD and you should be back to where you were.
Hope this helps.
