If a new version exists, the Cisco Jabber client prompts the user to upgrade. Open the file on your computer and follow the prompted installation instructions. When prompted for your password, enter your Mac OS name and password and click Install Software.7.When the installation completes, click Close. Next, open your Applications folder and launch the Cisco Jabber app. thus, i assume that it should be working since desktop share is enabled by default. i can only find reference to IM-only screen sharing being available in Jabber for Windows. Cisco Jabber for Mac (Automatic update installation file) Login and Service Contract Required Install and Set up Cisco Jabber.