I need to decide whether I should support Mac OS X 10.4 / Tiger, and the decision likely hinges on what percentage of mac users are still running Tiger. I didn't find anything too reliable on the interwebs nor on Apple's developer website. Let's ignore the impending Snow Leopard release and it's impact on Mac OS version usage distribution.
Does anyone know of a study that might provide insight? Any other suggestions on how to figure this out? If you quote any numbers/percentages please include a pointer to the source.
Take a look at the Sparkle+ stats, that the Adium project is collecting.
The stats are available here.