How to set ANDROID_SDK_ROOT in mac?

vim ~/.bash_profile

Then add the following environment variables:

export ANDROID_HOME=~/Library/Android/sdk
export ANDROID_SDK_ROOT=~/Library/Android/sdk
export ANDROID_AVD_HOME=~/.android/avd

Android path might be different, if so change it accordingly. At last, to refresh the terminal to apply changes:

source ~/.bash_profile