Let's take a look at the HelloCocos2d project and the debug message that it generates. They will be few, but as you add more elements to your game, you will be able to get a lot of useful information from this data, as shown here:
Run the HelloCocos2d application.
Once it is running, open the Console. To do this go to Run | Console (Shift + cmd + R)
You will see the following output:
2010-04-09 15:05:13.189 HelloCocos2d[3197:207] cocos2d: cocos2d v0.99.1 2010-04-09 15:05:13.207 HelloCocos2d[3197:207] cocos2d: Using Director Type:CCDisplayLinkDirector 2010-04-09 15:05:13.388 HelloCocos2d[3197:207] cocos2d: GL_VENDOR: Apple Computer, Inc. 2010-04-09 15:05:13.389 HelloCocos2d[3197:207] cocos2d: GL_RENDERER: Apple Software Renderer 2010-04-09 15:05:13.389 HelloCocos2d[3197:207] cocos2d: GL_VERSION: OpenGL ES-CM 1.1 APPLE 2010-04-09 15:05:13.390 HelloCocos2d[3197:207] cocos2d: GL_MAX_TEXTURE_SIZE: 2048 2010-04-09 15:05:13.391 HelloCocos2d[3197:207] cocos2d: Supports PVRTC: YES 2010-04-09 15:05:13.391 HelloCocos2d[3197:207] cocos2d: GL_MAX_MODELVIEW_STACK_DEPTH: 16 2010-04-09 15:05:13.425 HelloCocos2d[3197:207] cocos2d: Frame interval: 1
There you can see the current version of Cocos2d, the type of CCDirector it is using (we talked about them a while back), the version of OpenGL it is using, and so on.