"adb,start-server' failed -- run manually if necessary".
This error information show on Android Studio.
I have try to input sudo lsof -i tcp:5037 on Terminal, but nothing has shown.
And I have tried kill adb on Activity Monitor, it still not working.
I can change ADB port on Win7, just create a environment variable, named ANDROID_ADB_SERVER_PORT.
How to create a similar variable in OS X?
If my description not clear, tell me, please.