Apple has officially moved on to newer macOS versions, making it difficult to find the standalone installer for High Sierra 10.13.6 —the final version for many 2009–2011 Macs without a firmware update. If you need to create a bootable USB or upgrade an older machine, here is a verified DMG file hosted on Google Drive.

If your goal is to use Google Drive on macOS 10.13.6, you must download the specific for desktop. Download the installer from the Google Drive Help site . Open GoogleDrive.dmg and run the GoogleDrive.pkg installer.