Hi, I just bought and downloaded AOW2 and I'm trying to open the map/scenario editor. I can't seem to find it?

You can open it via Windows Start menu (All programs>GOG.com>Age of Wonders 2>Editor) or go into game folder and run this file - AoW2Ed.exe.

Thanks for your help, but actually I don't think I'll be able to run it after all...I have a Mac and I've been using an emulator of sorts to run the actual game, but near as I can tell there's no equivalent to make the editor run on Mac. If anyone here does know of any way to use the editor it'd certainly make my day but otherwise I'm at my wit's end.

Depending on the emulation environment you're using it could be possible to run the editor as well. E.g. If it's a Wineskin wrapper, open the package by right-clicking or Cmd-clicking the app and select "Show Package Contents". Inside search drive c for the game's installation folder usually somewhere in Program Files, probably in /GOG.com/Age of Wonders 2/
Then start AoW2Ed.exe there.