[Q] why AOSP emulator is always offline

I've built current aosp master and when I run an emulator - adb says it is offline. Does anyone know the reason/solution for that?
This is how I build.

HTML Code:

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source build/envsetup.sh
lunch aosp_x86-eng
make -j8
emulator

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Host os is Darwin-15.0.0-x86_64-i386-64bit

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