User EdwardR of the original Ace of Spades forums created a port of the game available to OS X users. More information can be found here.
Ace of Spades operates differently than most games. The game is only run when commanded to through URL parameters (denoted by aos://), and has no in-game menus. Surprisingly, the game is very versitle and customizable, despite these shortcomings.
To join a server online (and thereby start up the game), a user must first find a link to a server they wish to join. The most accessible and expansive server list can be found on Build and Shoot's website. If the game is installed, simply clicking on the link should automatically boot up the game and have you join the selected server.
Ace of Spades does not have any in-game menus. All configuration is done via INI files located within the installation folder. The following table lists the settings found within the game's configuration file, config.ini. OS X users should right click on the application, select "Show Package Contents," and navigate to drive_C > Ace of Spades to find the config.ini. Open the file with a text editor to reveal the following contents:
drive_C > Ace of Spades
1 OS X users should not edit the mouse sensitivity.
Because Ace of Spades does not have any in-game menus, the only way to change the controls is through the controls.ini configuration file. All controls are entered as keyboard scancodes via hexformat. Use this table for reference. For example, to map a key to W, the hex would be 0x11. The possible key mappings are located below.
Due to the nature of the game and how it works, running the game through Steam is next to impossible. However, there is one way to get it to work.