Designing for mac app
I'm a newbie with mac apps. I am being confused how to design the images for GUIs having size compatible with all of screen.
I see on iPhone just have one or two size, so it is easy to design images for GUIs with 320x480 size. How about on Mac apps? Please help me. 

Thanks.
Designing for mac app
===

I'm a newbie with mac apps. I am being confused how to design the images for GUIs having size compatible with all of screen.
I see on iPhone just have one or two size, so it is easy to design images for GUIs with 320x480 size. How about on Mac apps? Please help me. 

Thanks.