Cross-platform GUI Application Design In The View of a Mac Developer

Developing desktop application is hard, develop a good desktop application is especially harder. However, in my humble opinion, Mac OS X developers have done a great job in this area, the apps they build are perfect examples for elegant, consistent and accessible user interface.

Thus, here I'd like to present the audience some of my understandings in this area, what I've learnt in developing Mac OS X software, and how we can apply these experiences to our free desktop: GNOME (and the API/framework it based on: GTK+).