Whenever Microsoft or Apple releases a major OS update, it’s very common to encounter problems with some applications and hardware peripherals that worked fine under the previous system. Snow Leopard is no different.
One program that worked fine under Mac OS X 10.5 was Parallels Desktop 3.0. When I upgraded to Snow Leopard, I was greeted with a screen message that I couldn’t use this version of Parallels with my operating system.
The solution was to upgrade to Parallels Desktop 4.0 which is compatible with Snow Leopard.
Other vendors such as MacPractice and Motorola (Netopia) have begun to release program updates that are Snow Leopard-compatible. If your program stops working under Snow Leopard, contact the company to determine when a software update will be available.