Treasury Software works with Microsoft Windows operating systems and can work on a Mac if a Windows emulator is installed.
There are several emulators available that can be used. Two of the popular choices are:
VMWare Fusion $79.99 (https://www.vmware.com/products/fusion.html)
Parallels $79.99 (https://www.parallels.com/products/desktop/)
Our System Requirements page provides additional information.