well I edited one of my minecraft worlds using MCEdit on my MacBook Air and then i loaded the map on minecraft and it crashed

Put the summary of the bug you're having here

What I expected to happen was...
What I expected to happen was for me to be able to play my minecraft world created using MCEdit

What actually happened was...:
What actually happened was it crashed after loading the map on the minecraft app

Steps to Reproduce:
1. created the map on MCEdit and edited it.
2. saved what I had created on it and closed the program.
3. opened minecraft, launched the world created using MCEdit and then waited until it loaded... or until it appeared like it loaded.