Windows:

XP, Vista, Windows 7
Clicker 5 or Clicker 6

Mac:

Clicker 5 - Mac OS X 10.5, 10
Clicker 6 - Mac OS X 10.5, 10.6, 10.7

Networks:

To purchase New to English for a network, simply purchase a Site License version. The CD includes a network installer, together with full instructions