Ibook does not detect projector

I have one ibook. I connect a projector and it is not detected. it is first time that use one ibook. I dont what version of operating system. I dont what characteristic has ibook. I need help please. Thanks

Are you saying that you don't know which version of the operating system you are using?
What color is the Apple in the upper left corner of the display? Is it blue or rainbow-colored?
From the Finder, click on that Apple and take note of what information is displayed as a result. What does it say about which version of the OS you are running?

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