Is it Mac compatible?
We'd love to provide a Mac version, and we plan to in the future, but we are currently focused on making the product as great as possible on Windows machines. Creating add-ins for Office for Mac is extremely difficult, as Microsoft do not open up their APIs for add-ins on OS X. We have some ideas on how to make it work any way, but they will have to come after we perfect the Windows version.
If you're screaming for a Mac version, please let us know at email@example.com and we will add you to our Mac beta list.
In the meanwhile, Mac users can use PPT Productivity by installing Windows and Office onto their machines using Bootcamp, or through a Virtual Machine. Lifehacker.com provides a good guide to do this here: http://osxdaily.com/2011/09/15/how-to-install-run-windows-8-in-virtualbox/