I had been running Sins on a Crossover 8.1 system just fine, using the install method suggested by others here (install in a virtual machine to get past Impulse, then copy it to your Mac partition and run from there using Crossover). After updating the bottle to 9.0 and re-entering my cd-key information when prompted, the game simply hangs on launch. It doesn't crash or anything, just hangs. Here's to hoping for a fast fix, and I hope this warning stops some Sins fans from updating to 9.0 for now.