Im getting lag where there it looks like I'm using x-ray file:///Users/BillyMc/Desktop/Screen%20Shot%202016-06-15%20at%207.11.46%20AM.png
Use a website like http://imgur.com/ to show your screenshots, a file path won't work. Chances are you're having a chunk error or the chunks are just taking a while to load, this can lead to it seeming as though you're able to see through the map like x-ray. From what I know allocating more RAM to Minecraft (Google is your friend for this) will reduce this.
