- last post: 01.01.0001 12:00 AM PDT
Yes, Mac users and Windows users can play with each other over Halo's multiplayer.
Just read the stickies and you should have all the information you need. The Maw gatherings happen every Tuesday and Thursday, around 8 PM EST (I think) where members of the Maw can come and play at the Bungie.net Maw Server.