Canon Cameras EOS 450D, Ixus 40, G7 cannot be used with iStopMotion to capture still images

Well, I must say the latest beta release 2.8.1 allows the detection of Canon digital still cameras. Thereafter I tried three of the listed Canon digital still, only 450D worked for first shot. I didn’t change any settings, thereafter it can’t be used to trigger frame capture. The software can identified all three cameras. When I chose one of them, and say trigger capture, 450D shows busy in the screen and never can’t trigger the shot. G7 can be triggered but the frame is not captured into the software.

I hope this can be addressed.
-Macbook OSX 10.6.8 snow leopard

This topic is already being discussed in this thread:

Thanks…seems like the way apple deal with Canon cameras.