How to resolve the “ADB server didn't ACK” error? [duplicate]

Answer 1

On my Mac, I wrote this code in my Terminal:

xxx-MacBook-Pro:~ xxx$ cd /Users/xxx/Documents/0_Software/adt20140702/sdk/platform-tools/

xxx-MacBook-Pro:platform-tools xxx$ ./adb kill-server

xxx-MacBook-Pro:platform-tools xxx$ ./adb start-server

• daemon not running. starting it now on port 5037 *
• daemon started successfully *

xxx-MacBook-Pro:platform-tools tuananh$

Hope this help.