Icon Composer and the 1024 pixel question

Hi,

I downloaded this morning the new Xcode 4.6 on my Mountain Lion iMac and the latest Graphic Tools available.
When I launch Icon Composer (that is version 2.4) the max size for icons is 512 pixels.

My friend use Mountain Lion with an old Icon Composer version 2.2 that have a 1024x1024 button at the right of 3 existing buttons called Images, Masks and Preview.

Why in latest version this button don’t appear?

PS: The problem appear also with other version of icon Composer released in August Tools.

Ame

Sorry,

found…

http://developer.apple.com/library/mac/#documentation/GraphicsAnimation/Conceptual/HighResolutionOSX/Optimizing/Optimizing.html#//apple_ref/doc/uid/TP40012302-CH7-SW3

Ame

For those lazy to click, the pertinent part of that page says: