Supernova 2: Spacewar
There aren’t many space simulation games on Mac. Especially complex simulation like this one. In the game you can choose between 2 factions, each with its unique ships and technology, and start a galactic conquest. There are two distinct phases: the management phase where you decide what to build, research, the resources distribution, and more. Then, there’s the wargame part, in which you’ll have to move several ship around a battlefield. The wargame is very detailed and is turn-based, while the management part can be played both in real-time or with manual advancement.