I've recently installed the full version of TeamViewer 9 on an iMac and MacBook Air belonging to a relative, both running OS X 10.9.4. I installed the full Windows version on a Windows 8.1 laptop and it worked beautifully for remote controlling both mac's from the pc. The desktop wallpaper on both mac's goes blue during the session, as specified in the options, and properly returns to the original background after the session terminates.
The only rub is that if i subsequently go to the mac login page, and then log back in to the user account with TeamViewer installed, the desktop background goes to solid blue after about a second. It stays that way until I either quit TeamViewer or start a new remote control session to that mac and then terminate the session.
All three installs were done two days ago with the current versions from the TeamViewer web site for both operating systems. Both macs are set up to run TeamViewer on startup.
