All third-party games that I have won’t run on steam whenever I try to launch. I get an error like: Steam must be running to play this game. This happens with braid, with torches, Civ IV and osmosis, but portal works very well. I basically try to run this game on MacBook Pro 2.4 with Leopard 10.5.8 which I have. I tried to reinstall all applications and steam, but still I have the same problem. Anyone have any suggestions?
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