I'm running all the latest updates of BW9, on an iMac (Mavericks) and a 2nd monitor, an 18" Dell at lower resolution.

BW under the emulator is opening on the second monitor, with the program running off the side. Its responsive, but can't be resized or moved. I CAN drag it to the main screen... but then it becomes completely unresponsive, and still has part of the window missing, oddly enough. The only option is to restart. I realized the odds of another BW 9 customer running the Mac version on a 2-monitor imace setup are low, but wanted to post it here anyway. Video of the problem, about 10Mb.
http://cl.ly/3y3Y2Y1Y0E1P

I haven't rebooted it yet, that will probably help.