I have a Canon PowerShot A590 and a Macbook Pro with Lion 10.7.3. I installed the Canon software from the installer CD with no apparent problems (although I did a custom install and declined the PhotoStitch program). It isn't working. I tried reformatting the memory card (from within the camera) but it didn't do anything. When I connect the camera to my Mac, the CameraWindow utility opens and sometimes says "No camera was found," sometimes just opens and closes without saying anything, and sometimes closes then opens CameraWindowDC which says "failed to initialise program" (although behind this message there's a window and in that window I can see the picture on my camera!). MyCamera function "isn't supported by the connected camera." None of the other programs that installed with the CD do anything. Suggestions? Thanks!