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MacBook Pro - Official manual:

Your MacBook Pro comes with two graphics processors, one for better battery life and the other for higher performance. To switch between processors, open System Preferences, click Energy Saver, select “Better battery life” or “Higher performance,” [sic] and then follow the onscreen instructions.

I followed the instructions and opened "System Preferences" -> "Energy Saver". However, there is neither a "Better battery life" nor a "Higher performance" to select.

What could have been the problem?

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up vote 1 down vote accepted

The layout depends on which exact model you have. You can see in the URL that this is the manual for the late 2008 model, which was sold from 10/2008 to 01/2009. See this list of manuals and select the one applicable for your machine.

On my early 2010 Macbook Pro, it looks like this (near the top):

enter image description here

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the image in my system look exactly the one in your image EXCEPT i do not have Anything above the "Battery / Power Adapter" line.. – Pacerier May 1 '11 at 0:25
i didn't buy this laptop.. i don't know which model it is. is there a way to check it? – Pacerier May 1 '11 at 0:25
@Pacerier Open the Apple menu, click About This Mac, then More Info…. On the right side, there's the Model Identifier, e.g. MacBookPro6,2. Download MacTracker and search for that identifier. That's your model. – Daniel Beck May 1 '11 at 0:28
@Pacerier In the same program (System Profiler) you can view your installed graphics cards by selecting Graphics/Displays in the list on the left. I assume from your description that you have an older or less powerful Macbook Pro model with a single video card that is simply missing this option completely. – Daniel Beck May 1 '11 at 0:31
@Daniel Beck I have NVIDIA GeForce 320M VRAM 256 Mb. btw identifier is macbookpro7,1 processor name: intel core 2 duo. is this the 2010 version? – Pacerier May 1 '11 at 0:43

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