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What * means from for example League of legends?
I understand that number 1 is that you need to lower some setttings to get 30fps but that * ?

The * indicates that, that game is played on the system with a particular configuration that is provided at the end of that list. (The note section).
 
The intel core M is not geared for gaming, its geared towards general day-to-day computing. That means surfing the web, watching videos, music, word processing etc.. You can't call it an awful processor because you can't do heavy computing because it just wasn't designed to do so! If you want to be able to edit videos/play games ya know heavy computing stuff and want it to be portable, get one of the i7s MacBooks or go windows.
 
If you like Core2duo performance (T9600), than this should do it.

Apple is just testing the limist of their customers stupidity
 
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