mac android studio Waiting for application to come online解决方案

1.重启MAC电脑，笔者成功解决

2.如不能可尝试如下

I found the issue. See this image below:

First I select the second option, and it worked fine. But then don't know why I change to select first option. So, the debugger shows the messageWaiting for application to come online forever. And I did not notice that, just thought another app prevent me debug or that was an issue with Android Studio 2.0.

So, just check to second option will solve my issue. Thank all.

参考地址：http://stackoverflow.com/questions/36723813/not-able-to-debug-app-on-android-device-android-studio-2-0