On what operating systems can I run KaleidaGraph?
KaleidaGraph v4.5.4 will run under OS 10.4 up through OS 10.14 (Mojave).
KaleidaGraph v4.5.4 will run on Windows XP (SP2) up through Windows 10.
If you run into a problem with v4.5.0 – v4.5.3, download a v4.5.4 updater from the Software updates page. For even older versions, you may need to buy an upgrade to the current version.