Download and use an authenticator app to get either an approval notification or a randomly generated approval code for two-step verification or password reset. For more setup options, see: Authenticator app. After you download and install the app, check out the Authenticator app overview to learn more. Since Google Authenticator is an Android App and cannot be installed on Windows PC or MAC directly, we will show how to install and play Google Authenticator on PC below: Firstly, download and install an Android emulator to your PC Download Google Authenticator APK to your PC Open Google Authenticator APK using the emulator or drag and drop. Download Google Authenticator App For Mac.