Mac OSX Drift Racing Physics



Hey guys, i need help! ;)
First of all sorry for my english! I'm Italian

I'm trying to create a racing game on my Game Maker Studio 2 (I have an Imac) and I found a really good tutorial by rm2kdev

but I have some problems because he works with the gamepad codes!

Can you help me to translate the same codes for the keyboard controls?

I also found (in the part 3 of the tutorial) a .gmz file of the full project ( but i can't import projects in my Mac beta version or in my Game Maker 7 Mac version :(