I'm getting a compile error using XCode 7.1.1 relating to iconUtil. The error only occurs on a El Capitan machine. I don't get the error on 10.10.5 Mac also with XCode 7.1.1 using the same exact project.
The error is:
Iconutil Error
Variant named 'icon' contains no image resources.
Failed to generate ICNS
The contents of my icons.iconset folder are as follows:
-rw-r--r-- 1 username staff 9311 Sep 4 2013 icon_128x128.png
-rw-r--r-- 1 username staff 17852 Sep 4 2013 icon_128x128@2x.png
-rw-r--r-- 1 username staff 3432 Sep 4 2013 icon_16x16.png
-rw-r--r-- 1 username staff 4242 Sep 4 2013 icon_16x16@2x.png
-rw-r--r-- 1 username staff 17852 Sep 4 2013 icon_256x256.png
-rw-r--r-- 1 username staff 37176 Sep 4 2013 icon_256x256@2x.png
-rw-r--r-- 1 username staff 4242 Sep 4 2013 icon_32x32.png
-rw-r--r-- 1 username staff 5780 Sep 4 2013 icon_32x32@2x.png
-rw-r--r-- 1 username staff 37176 Sep 4 2013 icon_512x512.png
-rw-r--r-- 1 username staff 72764 Sep 4 2013 icon_512x512@2x.png
I get the same error when running iconUtil from the command line.