In my case with Android Studio 1.1.0 path was this
/Users/wzbozon/Library/Android/sdk/platform-tools
Add the following to ~/.bash_profile
export PATH=~/Library/Android/sdk/tools:$PATH
export PATH=~/Library/Android/sdk/platform-tools:$PATH
Is adb installed? To check, run the following command in Terminal:
~/Library/Android/sdk/platform-tools/adb
If that prints output, skip these following install steps and go straight to the final Terminal command I list:
Launch Android Studio
Launch SDK Manager via Tools -> Android -> SDK Manager
Check Android SDK Platform-Tools
Run the following command on your Mac and restart your Terminal session:
echo export “PATH=~/Library/Android/sdk/platform-tools:$PATH” >> ~/.bash_profile
Note: If you’ve switched to zsh, the above command should use .zshenv rather than .bash_profile