How to make PC multiplayer or campaign mods playable on the mac
1. Edit a campaign or multiplayer map (that is not Halo:Custom Edition) however you want in Halo Mapping Tools for windows or what ever program you want to use.
2. Once your done and have saved the changes to the map load the modded .map file onto a disk or a flash drive.
3. Put the modded PC map on the desktop and open it with Hexedit. Then press apple a to select all of the hexedit code, then copy it.
4. Then open a mac version of that map with Hexedit.
5. Then press apple a then apple v, or go to the edit menu and click select all and then paste to paste the hexedit code from before over the code you selected. Then save and play.
You can also open up the modded map with Hexedit and compare (by pressing apple k then selecting the origonal map) that map to a mac version and make changes to the origonal mac map if the above method does not work. If I am able to I will post one of my modded map eventually.