Our tech people are working hard on a new desktop app for Mac users that's compatible with the new 64 bit OS Catalina. In the meantime, you can certainly keep working on your Homespun lessons. If you haven't already done so, download the latest Homespun Purple Player app here, which is compatible with Catalina: https://go.platformpurple.com/purpleplayer/macos
Of course, if you have a mobile device (iPhone, iPad) you can easily get our mobile app from Apple's App Store: http://instantaccess.homespun.com/iOS
Let us know if you have any further issues, and look for the announcement of our new desktop app in the coming month or two.