The game crashed whilst initializing game Error: java.lang.NullPointerException: Initializing game

Hi there,

My computer it's a MacBookPro, with the next properties:* Image 1*

(First of all, excuse me if my english isn't good enough, I'm from Spain)

Last day I installed a new update for my Minecraft created by HeberonYT which is called Modpack KARMALAND 1.7.2 - (v1.2). This modpack includes the LAUNCHER & also the FORGE (here's the link http://minecraftiamodpack.blogspot.com.es/2014/08/modpack-karmaland-172.html). Image 2
The problem starts when we are talking about an old version that require 7.75 Java. I experiment so many obstacles before I could achieve the fact that the game just opens for itself (because after this, it doesn't boot up).
Anyway, once it starts opening, it just collapse. Image 3
I request for an inform and I detected two mistakes on the system details:

Current Language: ~_ERROR~ NullPointerException: null
Vec3 Pool Size: ~_ERROR~ NullPointerException: null

I have no idea about programming, and I don't know who ask for help. I've been looking for information on the internet and yt but I couldn't find anything useful for my case.

Thank you so much

Yours sincerely,

Jheda