Bad normal map baking I'm trying to migrate from 3Ds Max to Blender and everything was good until the moment I started to learn baking process. I have a 6 faces cube as low poly and its subdivided copy as high poly. Using ray distance or cage gives no difference. What am I doing wrong?
If you have just started blender the struggle is real hahaha. 
Jokes aside probably your ray distance is really big. Try from .010 too .100
See if it works.

Also remember that both high and lowpoly meshes need to be in the exact space.
And remember you need to check the selected active check box. and select first the highpoly, and then the lowpoly. then pressed bake, but i assume you already know that.

Goodluck.