I'm only dropping in with a comment because my mic is sat on the table next to me and I could confirm my memory that the Blue Yeti passes both the Mic Input and other Audio through its own internal headphone socket. Also, if I mute the mic other audio still passes through.Another issue with the Meteor is that if my headphones are plugged into the mic I can't hear the backing track coming from the iPad. Apparently the headphone socket on the mic is for "monitoring the recorded signal with no latency" whatever that means?
I'd add that this is on a Windows laptop, so not sure if using a Mac would change anything. Hope that's useful info.