SDI ScanConverter for OSX allows you to broadcast your entire OSX screen, or just window contents as a low latency, broadcast quality SDI stream through BMD hardware.

Select your whole screen, or the first window of any running application, or a draggable region of interest, and selectively control live output, freeze last frame or output black. The SDI ScanConverter window itself is hidden.  You can choose to fill any empty section of the video output with black, white, green or enable fill and key alpha mode to enable fill and key operation with compatible hardware.