It is very easy to download Google Drive. Simply go the website for Google Drive and click the download Google Drive button. Then you will follow all of the prompts to download on your computer. It should only take a few minutes.
If you mean, would you be able to access Google Drive on a MacBook, yes, you can do that. Google Drive is accessible across nearly all platforms, and you can upload and download from it, read and edit from it freely on a MacBook.
Google Drive is a Cloud File Storage Service, powered by the Google Inc. On Google Drive, you can easily store your files(photos, documents, videos, etc), and you can reach them from any devices(smartphone, tablet, PC, etc). If any of the files had changed, the change can be seen on any device.
Google online storage can be utilized by storing and organizing documentation using the cloud via Google Docs. Space can be made at home or at work on your computers, by using Google's storage efficiently. Google Drive has options to upload, edit and share your files online.