This app was removed from the App Store.
Mac OS Developer Tools
Mask-R-Aid is a tool that simplifies the creation of icons by focusing on the creation of icon masks. If the edges of an icon are not blended properly with the background, then the icon will end up with rough looking edges. The focus of Mask-R-Aid is creating proper icon masks so that your icon will look great sitting on the desktop. Since Mask-R-Aid does all the work of creating the mask for you, it saves you a lot of time. In seconds you can have a completed icon!
Improved the stability of Mask-R-Aid.