The CCBReader file format is documented here:
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# SpriteBuilder - CCB File Format
This is a description of the SpriteBuilder save file format. It is also used internally in SpriteBuilder and is used by export plug-ins. Published files are (by default) saved in the CCBi file format.
CCB files are simple Plist-files with a ccb extension. To dissect a CCB file in Xcode, simply rename the extension to .plist and open it with Xcode.
### Document (top level)
The root node in a CCB file is a dictionary. It contains the following properties:
<td>fileType</td><td>String</td><td>Must be SpriteBuilder</td>
The CCBReader for Cocos2d-x is not updated
CCBReader Class Reference
All those developing on Mac OS with Cocos2d-x, which is large number- have no choice in this regard. Spritebuilder is for Mac/Objective-C whereas Cocostudio is for windows. Is there a Cocostudio Mac expected soon? or can we have CCBReader in cocos2d-x soon?