I finally tried to convert my Cartoon Barry icon into a proper Mac icon.

How did I do it? I followed the instructions on Macapper.com. In short:

(1) Used Photoshop to edit my image into a PNG file with transparency.
(2) Used Icon Composer in Apple Developer tools to create a ICNS file file.
(3) Used Icns2Rsrc to convert that file into a RSRC.
(4) Pressed Apple key plus I and then copied the image to my folder.

Here it is.. You can download it if you like also.

The icon looks like the image in the picture below.

cartoon barry mac icon