M3

This is the old computer of one my IT teachers. As you can see it has a decent overall score, but its not amazing. The average score is around 900, which means this is way off other computers and could be so much better. The CPU score is the worst of all the scores since CPU should be MUCH higher than that. To improve the performance of the computer he could check to see how many processors the computer is using,  but because the CPU is so low, I doubt any changes within the system will make it that much better, so I would buy a new processor.

The RAM is also quite low. Most computers that are around the overall average score of 900, have a RAM score of around 200-250, so this way behind. I would buy more/faster RAM. 

The graphics test was dreadful. 29 is an appalling score. This is no where near good enough to play quite a lot of games to their full potential. There is only one way he can improve this to the level that is good enough - to buy a new Mac. Mac's graphics cards are not replaceable and so he cannot simply buy  anew graphics card, if he wants good graphics, he will have to ditch his current Macbook and buy a new one.