The article is here http://www.rockstargames.com/newswire/article/8601/asked_&_answered_red_dead_downloadable_content_soundtrack_classic_gtas_on_mac_the_banhammer_and_much_more.article
Quote"You guys thinking of making your games available on Macs?" - Al
Yes! Look for the long-awaited release of the classic Grand Theft Auto Trilogy (Grand Theft Auto III, Grand Theft Auto: Vice City and Grand Theft Auto: San Andreas) for Mac - most likely later this year. We'll have much more info and a proper announcement soon. But, yes, in case you were wondering, that is a world exclusive from Asked and Answered.