I just finished the trial test.
I didn't see anything saying that it won't work on a mac, so I moved forward. But the file you download for the test, didn't work. I even downloaded it a couple times, thinking maybe there was something wrong with it. I'm guessing that was supposed to be the website we look at for the answers? All that appeared was a skinny, vertical, gray box - no website, no pictures, no words, etc., just a light gray box. So I wasn't able to complete any of the tasks.
But now, here's the kicker: After not being able to complete any tasks, I received an email saying congratulations, I received a 5 out of 5, which is the maximum score (most likely a generic response).
I'm going to look more into it, but there doesn't appear to be much you have to do to qualify or pass the test.