EazyDraw provides full support for Yosemite, Mac OS X version 10.10.
EazyDraw 7.1.0 runs on Yosemite, updated versions of Mavericks.
EazyDraw version 7.0.2 supports Snow Leopard (OS X 10.6), and might be needed on other versions of OS X (newer than 10.6) that are not fully updated.
EazyDraw version 7.0.1 (Retro Version) runs on OS X 10.4.3 and newer including Yosemite.
EazyDraw Retro is needed for PICT, AppleWorks, ClarisDraw, MacDrawPro, MacDrawII and MacDraw support.
One purchase, all versions. Only one purchase of a version 7 license code allows use of all 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.