Vsync doesn't work

[juandemarco]

Just a little update: I have found a way to attenuate the issue! It's not solved, vsync is still not present of course, but setting the right resolution made it almost unnoticeable. Let me explain: on the iMac 27" native resolution is 2560x1440 but the game doesn't allow you to go over 1920x1080. I was playing at that resolution and the absence of vsync resulted in a very annoying horiziontal line moving vertically across the screen as I looked around or moved. I have modified the game config file and have manually set the resolution to 2560x1440 and though vsync is still not present, the annoying horizontal line is gone and the game is playable! Hope this helps others with the iMac 27 who are having the same issue.
Cheers
Juan

PS. The config file is under ~/Library/Preferences/Frictional Games/Penumbra/Overture/settings.cfg