The FreeHand application was compatible with versions of Mac OS X up to 10.2.6. However, it seems the software has been discontinued and replaced by another product. I recommend that you visit the website of Adobe in order to find an alternative for this application. The official application that replaces FreeHand is Adobe Illustration. It's more powerful than FreeHand and it's also available for Mac OS. Access the website to find more information as well as downloading and purchasing information.