I didn't know how to disable the "pseudo-flash" setting in Photobooth (and there's no setting that you can change directly to override this) and so, to this day, I used the reversed contrast setting trick: in my case I have to press Command+Option+CTRL+8 to activate it and then the "pseudo-flash" will be black instead of white. But then again, using this trick doesn't allow me to fully control the quality of the photo because I still have to see it with that x-ray look.
Lucky enough, Mac Tricks and Tips has posted these useful tips to use with Photobooth:
- Disable Flash in Photo Booth
- Disable Countdown in Photo Booth
Disabling flash in PhotoBooth is really easy all you have to do is hold the Shift key while you click to take a picture and the screen will not flash white.
Disabling the picture count down in PhotoBooth is just a matter of holding down the Option key while you click to take a picture, your photo will take immediately.