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DEFCONEventsUpdate for Mac OS X 10.13 and later.

Game update

Update for Mac OS X 10.13 and later.

DEFCON · published 8 Sep 2024, 11:25 UTC · build 15579130

All events Players around this date Read on Steam

Make Mac OS X 10.13 build the default. Should resolve "damaged and can't be opened" issue on recent Mac OS X.

More from DEFCON

Other announcements

DEFCONGame update11 Sep 2026Update Notes for 1.70.21.70.2 Bug Fixes · Fixed a crash on startup, and when pressing Apply in the Mods window, caused by mods whose gameoptions.txt leaves a blank line where a text settings default value belongs. · Fixed a crash on startup for anyone with extracted main.dat files in their Defcon folder whose names differ only in capitalisation from the originals. · A missing font file no longer closes the game, Defc…News24 Aug 2026Defcon Update in Beta TestingDefcon Beta Update Announcement We would like to announce that, thanks to the hard efforts of Defcon fan, volunteer and skilled developers, Keiron McPhee and Jasmin Brumme, we have a new build of Defcon to test! The core experience remains pure DEFCON, but under the hood much has changed. There is a new graphics (DirectX, Metal and Vulkan) and sound subsystem (FAudio), hundreds of performance e…DEFCONCommunity15 Feb 2017Everybody Dies in VRIntroversion joins the VR party! After Prison Architect, our most successful game is DEFCON - a nuclear war strategy game inspired by the 80s movie War games (If you've not seen it, so yourself a favour and check it out over the weekend) DEFCON VR allows you to spectate DEFCON games in the comfort of your own virtual War Room. Join others and marvel at total global annihilation as nuclear missi…