Bleed

This is a sample project of how to use Adobe Illustrator SDKs SendScriptMessage interface for Macintosh(Xcode).

You can push this Plugin from ExtendScript and set a document bleeds.
Ex:

alert(setBleed(36)); //unit = pt

function setBleed(n){
var result = app.sendScriptMessage('Bleed', 'Bleed', n);
return result;
}