PO.DAAC's WebDAV interface allows you to connect to PO.DAAC as if it were a local drive on your computer. In order to connect with WebDAV, you'll need to use your Earthdata Login username and the WebDAV password that's been assigned to you.
PO.DAAC Drive supports Mac OS X 10.9 and higher.
From the Finder, click Go/Connect to Server, or press ⌘-K.
In the window that appears, enter the following under Server Address: https://podaac-tools.jpl.nasa.gov/drive/files
When prompted to log in, use your Earthdata Login username and WebDAV password.
You can now browse PO.DAAC files with the Finder and copy them to your computer just as you would with a local hard drive. It's best to copy a file to your computer before opening it.
To disconnect, drag the drive into the Trash or right-click it and select Eject.