The patch I work with contains three mira frames. Quite regularly upon launching, mira crashes. When a crash occurs after I’ve turned on audio, audio stalls for a long time, and next the connection is gone and cannot be re-established. Restarting max is the only option. (osx 10.9.1 / max 6.1.6 / rme fireface)
The cause of the crash is not clear, but it always seems to happen while mira creates the ui view. A workaround is to launch mira, click on each tabs and count to three (allowing mira to create all views), then turn on audio. I have not been able to test thoroughly, but this seems to work.
Additionally, just tried changing load order using forward/backward commands from the Arrange menu in max; at a first glance this seems to diminish crashes. When mira loads 2nd, 3rd and 1st tab (the 1st tab being in front of the others but not in an abstraction like the others), it appears to be happier then when the order is 3rd, 2nd, 1st.