How to fix adb command not found in terminal for OS X/Mac

The problem is: adb is not in your PATH. This is where the shell looks for executables. You can check your current PATH with echo $PATH.
Open the shell profile , and at the bottom of the file, add the following lines.
vim ~/.zshrc
Then add those eviornment variable
export ANDROID_HOME="$HOME/Library/Android/sdk"
export PATH="$ANDROID_HOME/tools:$ANDROID_HOME/tools/bin:$ANDROID_HOME/platform-tools:$PATH"
Save the profile file with :wq , then, run source ~/.zshrc

Видео How to fix adb command not found in terminal for OS X/Mac канала Apple Bytes