Backtrace shows 'read fault 0x00000' on Mac OS 10.6 (Snow Leopard)
This page no longer applies to current versions of CrossOver
Mac 10.6 has secure virtual memory enabled by default and that can cause Wine (the core of Crossover) to be unable to read memory addresses it needs. This can cause all sorts of unexpected crashes and hangs that aren't generated on Mac 10.7-10.8. On Mac 10.7 & 10.8 securing virtual memory has been replaced by the Gatekeeper system.
To fix open System Preferences, Security pref pane, General tab, and uncheck Secure Virtual Memory and restart your computer.