Emmett asked:

>Is there a proper ratio for window width:height?

Emmett:

Other than that the Golden Rectangle is aesthetically pleasing, in a word no.

However, you should acquaint yourself with Apple's Human Interface 
Guidelines (HIG). There is a special section for windows:

http://tinyurl.com/yg9up3l

This will tell you everything you ever wanted to know about window 
construction and a little more. From this page you can download the 
entire HIG PDF document by clicking on the small PDF icon at the 
upper right hand corner of your browser window.

Ken