@brentr Perhaps I should be a bit more clear. I have not found a way to make the warnings disappear or to make the emulator work flawlessly. However, if I open the emulator first (by opening xCode and then opening the emulator from the menu) and then run the ionic emulate command, it will still show the errors but the application loads in the emulator as expected without timing out. If I am inside of a tmux session, however, it times out regardless, thus my original comment regarding tmux.
No matter what, I still see the errors. It seems, as has been pointed out, that this is a Cordova problem and will hopefully be fixed soon. But, you should still be able to continue development by ignoring the errors and opening the emulator manually prior to running the ionic emulate command.
As an aside, for anyone who wishes to continue to use tmux, you can do so by following the instructions in the Tmux section of the ios-sim README: https://github.com/phonegap/ios-sim