1. How to find him
Open Android studio, go to Android Studio> Search for preferences for sdk and something similar to this (this is a Windows window, as you can see) will show 
You can see the location there, in most cases it is /Users/<name>/Library/Android/sdk
2. How to install if not
Just go to the Android Standalone SDK download page , download the zip file for OSX and unzip it to a directory 
3. How to add it to the path
Open a terminal application and open the path file in nano by typing
sudo nano /etc/paths
Enter your password, go to the end of the line and enter the directory path. And you want to add: for example: -
/Users/username/Libs/android-sdk-mac_x86/platform-tools

Save it by pressing Ctrl + X, restart the terminal application and see if it works or not - enter the name of any file or binary file that are in the directories you added and make sure that it is open / executed.
insomniac Dec 30 '15 at 15:22 2015-12-30 15:22
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