There are lots of discussions going on about this update released last week via the App Store.
These are the steps I took to have minimal issues and impact during the Update. These steps were first tested on a backup Apple Remote Desktop machine with a functional Apple Remote Desktop installation, complete with copies of scripts used in Production. In my case, I use a Virtual Machine.
- Download Apple Remote Desktop 3.9 Client: http://support.apple.com/downloads/DL1909/en_US/remotedesktopclient.dmg This download appeared on the Apple Support Site after Apple Remote Desktop on the App Store.
- Open the Apple Remote Desktop Client 3.9 download and install the pkg file and reboot the backup Apple Remote Desktop machine.
- Now install Apple Remote Desktop App from the App Store Updates.
- Start Apple Remote Desktop App. Enable setting Remote Desktop -> Preferences -> Security -> Allow communication with older clients ( less secure ) Close app and reopen.
- Deploy to one client, Apple Remote Desktop Client 3.9 pkg via Apple Remote Desktop App -> Manage -> Install Packages, or use on the client, App Store to install Remote Desktop Client 3.9. Reboot client.
- Within Apple Remote Desktop, reset the password of the client: hover over client -> right click -> Get Info.-> click edit button -> retype password in Password Field -> click Done button.
- Disable setting Remote Desktop -> Preferences -> Security -> Allow communication with older clients ( less secure ) when all clients have Apple Remote Desktop Client 3.9 installed.
cheers, dwbrecovery