EazyDraw provides full support for Mountain Lion, Mac OS X version 10.8.
EazyDraw version 5.3.1 supports Lion (OS X 10.7) and Mountain Lion (OS X 10.8).
EazyDraw version 5.0.7 (Retro Version) runs on OS X 10.4.3 and newer (including Mountain Lion).
EazyDraw version 5.0.8 (Snow Version) runs on OS X 10.6 (Snow Leopard).
One purchase, all versions. Only one purchase ( a version 5 license code) allows you to use any of the above solutions. You will be able to use EazyDraw on all Mac computers, even if you have some on older or newer versions of the operating system.