Launch your web browser, and head over to the Google Drive website. Click "Download to iPod," and then follow the on-screen prompts. Read and accept the terms of service, then select a location where you'd like the files saved. A mirror image of your files will be provided on the page. Click on it, and you're ready to sync and synchronize your files!
You'll notice that there is an icon on the desktop called the Google drive icon. If you hover your mouse cursor over this icon, a drop down menu will pop up. Select the arrow key and pull the red circle close to it, and you are now setting up your Google drive profile for your Mac, in plain sight. The Google Drive application is built into many of the most recent Apple products, so it's as easy as can be to get set up. Once your personal account is all set up, you'll notice that it looks just like any other user account on the desktop, save for the small icon in the upper left corner of your Mac's system tray.
To finish off your set up, go to your settings and select the user name and password you've set up with Google. Save these and save the setting. Open your google app, go to preferences, and pick your new Google Drive profile. If your mac has been set up with this software before, everything should automatically synchronize. Otherwise, open the Google app, go to preferences, and make sure that your user name and password are correct, then save them. That's all there is to setting up your new google app for your Mac!