“Ever wondered how to make your own Mac icons? Have you ever created an icon and had trouble making the icons fully transparent? If you answer either of these questions with a yes, then this tutorial is for you,” Tutorial Dog explains.
“To complete this tutorial, you will need Adobe Photoshop (or any other image editor that will export transparent TIFF files), Xcode and CandyBar [US$29] installed on your Mac. Xcode is Apple’s free software development kit. You should be able to install Xcode from your computer’s install disk or download it off Apple’s Website. It’s also important to note that the newest version of Mac OS X, Leopard has moved to a maximum 512 pixel icon sizes. CandyBar allows you to organize your icons,” Tutorial Dog explains.
Full tutorial, including “Designing The Icon,” “Exporting The Icon,” and “Using Icon Composer & CandyBar,” here.