It may be worth taking the MC200 to the Apple Store, perhaps making an appointment at the 'Genius' bar? They tend to be very helpful and will probably get it sorted for you.
I had some issues at first with my Ensemble but a change to an Apple router seems to have sorted out most of them.
Good luck!

Roon Core,UltraDAC, MS600, Bluesound Node 2, Auralic Aries G1
Arcam AV860 Pre/Pro, Oppo UDP-203EU, Linn 350A/340A, SVS SB3000, Audio Research LS28, Revel Embrace, NAD Masters M27,