"Supreme Commander 2 is a real-time strategy video game developed by Gas Powered Games and published by Square Enix. It is a sequel to Supreme Commander. A PC only demo was initially released via Steam on February 24, 2010, with the full game released on March 2, 2010.
A Mac OS X version of Supreme Commander 2 was announced by Virtual Programming in May, 2010. A release date was not established at the time."
Source: Wikipedia, "Supreme Commander 2", available under the CC-BY-SA License.