How to manually create icns files using iconutil?

Question

When I\'m validating my app I get this error:

the application bundle does not contain an icon in ICNS format, containing both a 512x512

Answer 1

When I'm validating my app I get this error:

the application bundle does not contain an icon in ICNS format, containing both a 512x512 and a 512x512@2x image.

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I am not very good with terminal command and so maybe I'm doing something wrong. I wrote:

iconutil -c icns 

For one thing, as I mentioned in a comment on Anne's answer, you probably don't need to use iconutil. You should be able to just add the iconset to your project and let Xcode convert it for you as part of the build.

Either way, this may be your problem:

I tryed to put two PNG files togheter (512x512 and 1024x1024) … but I always get the error.

There is no 1024 by 1024 point size. The 1024 by 1024 pixel element (which was 1024 points before Mountain Lion) is now used for 512 by 512 points @2x.

Your PNG file must be named appropriately: icon_512x512@2x.png