If you give the gold to player 1 in map editor, the player 1 will have that gold, and putting player 1 to another position would make no difference. Note that it doesn't matter on which position you want to play the map. But just in case, make sure to have the backup of the map. Later if you delete the keep of player 1 you reset the gold for player 1 to zero again I think. You can do the same with materials, but gold is better, as you don't need any space for the gold. Also, if you want to give to player two some gold, you can do similar thing - by deleting player 2's cathedrals. Then when you start the game on that specific map you will have as much gold as you gave to yourself by doing this trick.
More cathedrals you delete more gold you give to player one.
If you want to give the gold to yourself, then you need to build cathedrals for player 1, and then delete those cathedrals. If you want, you can go in map editor, open some specific map, and add yourself some gold. I don't know how to make it work on MAC, or fi there is a version for MAC, but maybe this could help you. And welcome to Stronghold Heaven, TaoofPu!