I had a horrible time my first LSAT trying it on the MacBook Air. I had run all the tests, but the actual pop up to allow the proctor in would not come up. Took about an hour of troubleshooting before I could start my exam. They had to go in and change a bunch of settings and then I had to restart probably five times. Using MacBook Pro this go around, which seems to have much better reviews for Proctor U access.