None of the alternate themes actually made it into a final release of Mac OS; just Platinum. There was a fairly healthy third-party theming community, though,

None of the alternate themes actually made it into a final release of Mac OS; just Platinum. There was a fairly healthy third-party theming community, though, and the Apple-developed themes (Memphis, High-Tech, and a sketch-styled theme called Drawing Board) would still work if you got your hands on them.