Blizzard hopes to have a Mac version of the StarCraft II beta up and running in April.
The developer said on the Battle.net forum this was being worked on "currently" and for us to "hang in there".
StarCraft II: Wings of Liberty - the first of three StarCraft II games - will be be released in the first half of 2010.
http://www.eurogamer.net/articles/st...-beta-in-april
