Q: is there a way to bypass that?
A: I have no idea. However, I think MikeyDriver must be related to MacBook's External Mic and it may be about energy saving. If using External Mic (ExtMic in layout) might be linked to Mikey.kext. It is poosible to make front mic acting like Line In and you need to use a microphone that has power. I am thinking.
Q: to use a recent applehda driver and a correct plist?
A: I could not get Front mic work as External Mic since 1.6.8a3 AppleHDA.kext came out. It showed me "None." Got sound assertion of MikeyDriver. I have no idea why it couldn't work anymore.
他的意思大概是說，自從音效驅動更新到 1.6.8a3 版本後，
Sound assertion "0 == fMikeyDriver" failed in "/SourceCache/AppleHDA/AppleHDA-162.1.37/AppleHDA/AppleHDADriver.cpp" at line 1063 goto handler
估計是蘋果在更新驅動後，外接麥克風需要在連接到一個叫 MikeyDriver 電源管理的驅動