Halo Multiplayer Problems MAC.?
In my Halo 1 on Mac it will not let me play Multiplayer at all. When I try to Join a game all it does is give me a warning that says "WARNING your CD Key is invalid. But the rest of the game works.. And I REALLY want to play Multiplayer.. Please help.
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Sounds like you don't have a real copy of the game...
Um... don't use a MAC! They're not meant for gaming, and for the most part all those servers are from people without MACs, so you're not going to be able to connect!