Atomic Scribbler is Windows only. It will run on all recent versions of Windows: 10, 8.1, and 7.
It will not run on Windows 8 unless you first install the Windows 8.1 update.
There is no MAC version, and there are no plans to build a Mac version in the short or medium term.
Atomic Scribbler will run on 32 and 64 bit architectures & regular as well as High Resolution monitors.
Windows tablets with touch screens are supported, as long they have a full Windows 10 operating system.