1. The Steam version doesn't work on Mac, but you can download the Mac version here on itch.io. If you have any DLCs from Steam, those are actually compatible with the Mac version as well. Simply download the ".rpa" files from the "game" folder of the directory and move them into the "game" folder of the Mac version, and they should work!
2. itch.io and Steam should accept other currencies, but I don't know which one you need specifically. If you have issues processing payments, message us again and we'll see what we can do to help.
Thank you for your interest, and we hope you enjoy the game!