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.