Download the CDAML Access Client for your platform using the following link(s):
Mac version is known to not work on Mac OS 12.15 (Catalina). You need to use Mac OS 12.14 (Mojave) or earlier.
The Mac version requires TurboVNC installed separately. This can be installed with Homebrew https://brew.sh/ and then:
brew cask install turbovnc-viewer