Note to self: If you don't have the color data for Civ 1 on the Mac and try to play in 256 colors, you will see the opening scene in color, but the game will then blow up. If you try to open a game in 256, your Mac will freeze. Same with 256 shades of grey.
If you try to play in thousands of colors, somehow Civ is now smart enough to sense you don't have the color data and will play in black and white.
This, by the way, is a worst case for a machine with 1 meg of VRAM and a monitor that will display resolutions aboves 800x600.