1. 卸载Android Studio，在终端(terminal)执行以下命令

rm -Rf /Applications/Android\ Studio.app  
rm -Rf ~/Library/Preferences/AndroidStudio*  
rm ~/Library/Preferences/com.google.android.studio.plist  
rm -Rf ~/Library/Application\ Support/AndroidStudio*  
rm -Rf ~/Library/Logs/AndroidStudio*  
rm -Rf ~/Library/Caches/AndroidStudio*

2. 删除gradle

rm -Rf ~/.gradle  

3. 卸载Android Virtual Devices(AVDs) and *.keystore

rm -Rf ~/.android

4. 删除Android SDK Tools

rm -Rf ~/Library/Android*