Here is a list of current fixes / things to try regarding technical issues
1. Update graphics drivers (google how to do this for your specific computer). Please don't skip this step even if you think you have done it before, it's solved many issues for me before even though I thought I was on the most current one.
2. Restart your computer
3. If your computer / laptop has a dedicated graphics card, make sure it's using that graphics card (Energy Savings in OSX, I also love this plugin http://gfx.io/
which puts which card your laptop is using in the status bar and lets you switch it by clicking it, you need to make sure steam is launched with it set to nvidia, so after switching on the dedicated card, quit and relaunch steam)
4. If you only have an inegrated graphics card, sorry, the game doesn't seem to work that well because those cards cut corners on rendering and the game's collision detection is based on the GPU, so it can mess up. There are a few things to try that MIGHT help. Try the patch beta (or the version direct downloaded from humble bundle), as seen here http://steamcommunity.com/app/72000/discussions/0/828925216439935627/,
install drivers using the "have disc" method (some people have reported success doing this though I don't know exactly what this entails)
The beta build adds a few extra options to settings.cfg in the game's content folder, which may or may not help having it run on integrated. I will push this to the main branch of the game and put the mac version in when I get back from my holiday travels (I don't have my dev machine with me, just my laptop)
- Download X11 if you are on 10.7 or later and having trouble running the game http://xquartz.macosforge.org/trac/wiki
sound issues: fix here:
install openAL from here (oalinst.exe) http://connect.creativelabs.com/openal/Downloads/Forms/AllItems.aspx
then delete the openAL dll's out of the closure content folder (openAl32.dll, wrap_oal.dll)
(content folder is program files / steam / steamapps / common / closure I BELIEVE)
No window / not starting / incompatable resolution / crash on startup:
manually edit in your monitor resolution in the game's content folder
savedsettings.cfg: made when the game runs,copied from savedsettings_default.cfg initially if it doesn't exist
settings.cfg: other settings (resolution / fullscreen / controls are taken from savedsettings though)
open these in wordpad
Any other fixes people have post them here and I'll add them to the list if people find success with them
WORKAROUND: LOW LIGHT / INFINITE DEATH ON FACTORY LEVEL 1:
"the issue is that its rendering the spotlights slightly too dark. The shaders for the game are compiled from source, and I do include those in the resources for the game. I don't have any guarantees for how this effects the game, but the blur on spotlights is in Resources/shaders/hblur.cg and Resources/shaders/vblur.cg. You can open them in a text editor. Each of these has a line that looks like
sum *= 1.0/46.0;
try changing it to like
sum *= 1.1/46.0;
to make the spotlights around 10% brighter (i think) which might help (make backups of the files first)"
user Stevoisliak confirms that using 1.5 here makes the level work for him.
This workaround will most likely have unintended consequences later on in the game, so I recommend undoing it after you get past the problem area.