http://www.wsgf.org/dr/star-wars-jedi-knight-jedi-academy

So after using the above guide to change the resolution and fov of JA to widescreen, the game crashes whenever you try to load a map, this only happens with multiplayer though - singleplayer works fine in widescreen. A quick google reveals that many others have had this issue.

However because Jedi Outcast had it's source code released recently and there's a fan project (OpenJK) there's hope this will be fixed.

If you load a map at a normal resolution(4:3) in multiplayer and then do a "vid_restart" into the widescreen resolution it should work(set r_customwidth and r_customheight then change r_mode before the vid_restart). Naturally this is tedious since you have to do it at least once per session(It may need it every time you join a new server). The custom width and custom height values should stick but you will need to go back to a 4:3 resolution. Obviously this isn't really a practical solution though.

I have all the star wars games now on GOG(Except for Rebel Assault) and a fair number on Steam. The Mac builds on steam were done by Aspyr(here's hoping GOG could eventually work out a deal with them to get JO and JA here as well but I'm not holding my breath).

Anyway the Mac version on Steam appears to be DRM free. I can launch the downloaded game without a net connection or steam even installed(well I assume I can since the downloaded app does not launch steam when you open it) though naturally you still need to download it from Steam. But the mac builds on steam have been updated with a fix for this bug that I can verify was in the PC build as well as the older Mac build(the bug not the fix) since all my old versions failed to work correctly with the r_custom" " and r_mode method. I will also say that they offer native widescreen support in the Mac builds.

So basically hope they release a mac version though that may not help you and use the workaround I said in the top paragraph if you really need it to work. And yes hopefully OpenJK builds will fix it.

Use openjk