TDM just sits there bouncing in the dock for a while, then it stops and when I click it it disappears. From the log: Monday 11/03/2013 00:31:05.608 com.apple.launchd.peruser.501: ([0x0-0x117117].com.idsoftware.doom3[5344]) posix_spawn("/Users/szczypka/Library/Application Support/Doom 3/darkmod/TDM.app/Contents/MacOS/Doom 3", ...): Permission denied Monday 11/03/2013 00:31:05.608 com.apple.launchd.peruser.501: ([0x0-0x117117].com.idsoftware.doom3[5344]) Exited with code: 1 Monday 11/03/2013 00:31:05.610 Dock: no information back from LS about running process Monday 11/03/2013 00:32:34.610 [0x0-0x10f10f].org.mozilla.firefox: NOTE: child process received `Goodbye', closing down I now manually check the permissions of "/Users/genericUser/Library/Application Support/Doom 3/darkmod/TDM.app/Contents/MacOS/Doom 3" and it's not executable so I 755 it and I can now launch the mod - yay! Console log of launching then immediately quitting the mod: http://pastebin.com/P7am2qML When I then try to load a mission (the default two are listed), it tells me that it needs to install it and that it will relaunch. Manually relaunching allows me to start "Tears of St Lucia" only, and the Training Mission always asks to be installed. Tears of St. Lucia runs reasonably well, aside for a fair few graphical glitches with textures and particles (?) coming from the street lamps, however I only played it for a few minutes as it's late here I've got work early tomorrow.