Hi Neroli. Stupid question, but did you use the left and right arrows on the inventory bar to scroll through your items? Lot's of people tend to forget that those buttons are there (since it's rare that you need to use them).
As for why none of our other games are for Mac, it's because ECC was made using the PlayFirst engine (called Playground) which ports easily to Mac. The game was made for PlayFirst, so we got to use their engine. Unfortunately, that also means we are not qualified to give as much tech support as our other games, since we no longer have access to the engine. The game is owned by PlayFirst, so if you continue to have problems, my best advice would be to contact them.