OpenCV 'cvQueryFrame' non-blocking on OS X?

Question

Hello,

when I perform a cvQueryFrame on Windows, the API blocks until an image is delivered. On Mac OS X, I am at 100% CPU utilization, while only querying for an image and displaying it in a window. I am at the latest SVN version. Can anyone confirm my experience? Am I doing something wrong? Is there a work-around?

My loop code looks like this:

while(key != 'q') {
    if (frame)
        cvShowImage("Live Cam", frame);
    frame = NULL;
    frame = cvQueryFrame(capture);
    key = cvWaitKey(10);
}