i recently discovered that there are some special online commands (like in game messaging which apparently does not work in the mac version).

i had a game just finish where the opponent apparently surrendered (it says so in the finished game list). how does one surrender?

it was clear that he had not really responded, but it was not clear to me that he had surrendered. i played my turn to completion and was awarded victory.

what are the special multiplayer commands. do some not work on the mac version?

Check the menu.

not much help, the commands i knew about were there, but there was nothing about surrender. does that not exist in the mac version?