On the Mac, you must move the app from downloads to /Applications and load it from there. I you try to load it download you will get a failure to install message. I upgraded Sierra today and the software works perfectly. I hope the webmaster will put this information where users can easily find it.
The glitch results from Apple's new gatekeeper program. It is not a bug with Pankakemaker.
The PancakeBot is the world’s first food printer capable of printing pancakes by automatically dispensing batter directly onto a griddle in any shape of the user’s choosing. Pancake designs can be loaded onto the PancakeBot via USB or SD card. Representing an evolution in food-printing technology, PancakeBot lets kids and adults express their creativity through food while exploring technology.