Here’s a quick extension attribute to check for OSX/MaMi. Basically, I’m just looking for one of the two DNS servers that always gets put into the list. From what I’ve seen they always come in pairs. Below is a gist.
https://gist.github.com/krypted/e0a03d23a88ca0ff007b81a81744de29
Oh and thanks Katie for noticing my errant space! 😉