Hi there, Sorry to hear you're having trouble with MacDraft and the latest operating system. There is a new version of MacDraft that you will need to upgrade to, that is compatible with MacOS Sierra. Please check out the link here - http://www.microspot.com/products/upgrade/index.htm
I found with 6.0 that if you have a copied picture (⌘C) into the pasteboard before launching, it will crash on launch every time. Copy some text first.