@uv23: I'm using VMWare Fusion to run Windows on my mac as well - on the GOG forums I found this fix to make the game work:
Right click on the desktop shortcut for Fallout Tactics and go to properties. Then, in the "Target" line where you can edit the file path where the shortcut points to, add a space and "-w" (without quotation marks of course). This will make it run in a window and the game should work fine after that. You can download a patch that lets you use higher resolutions too, so you can maximize it without going full screen and take advantage of the extra screen real estate. Let me know if this works for you.