IcnsToTif
IcnsToTif is a simple application that allows you to convert the images contained in an .icns file
into .tif files.
To convert .icns images
1. Go to File > Open ICNS File to load an .icns file.
2. Use the arrow buttons to cycle through the images contained within the .icns file.
3. Go to File > Convert Current Image To TIF to export the currently selected image as a .tif file.
To batch convert all of the images within an .icns file, load the .icns file and then select File > Convert All Images To TIF.