1) Does it have something to do with your computer? Well, does your computer meet the requirements for Trapcode Tao?
2) Does it have something to with the plug-in? impossible to say. Tao's settings are interdependent meaning that the effect that "playing" with the amplitude setting depends on many other settings.
You're asking if the problem is being caused by your computer or by the plug-in.
Are sure the problem isn't you?
What steps have you taken to to eliminate the possibility that the problem is being caused by you not knowing how to use Tao?
Well according to their website my computer is suitable for it. And as I said I have a fairly good experience with after effects + I was following a tutorial exactly step by step it all works perfectly except for this part. Some people said they had the same issue in the comments section but I can't find it mentioned anywhere else.
You are misreading the system requirements for TAO. A 13" MacBook Pro has integrated intel graphics and TAO and MIR will not work with that graphics card. You are just out of luck unless you purchase a computer with an appropriate GPU.