Would you revert to the normal client, see if it is a beta update which caused it; least then we know to pass it on. Otherwise, this is still a steam for linux client tracker… and your bug seems 3rd party and for another platform :P
Occurs on non-beta client as well.
You're right on 3d party games and OS X, but as long as there's no unified (or additional) issue tracker for OS X / Windows, I'm going to use this one for problems that might be related to the Steam client.
Nothing extracted yet.
In the current Steam beta Super Meat Boy crashes
at startup when the overlay is enabled. Disabling the overlay fixes the problem.Operating system is OS X 10.8.4.
Update: The crashes persist even with the overlay disabled. Additionally, the crashes don't always happen at start, but throughout the game. So this might not be related to Steam.
Here's one of the crash logs.