Western Digital WD Elements hard drive

Hi JohnandMarge,

Thanks for using Apple Support Communities. We understand you have some questions about using and external drive with your Mac. We're happy to provide some information to help.

We have a couple of resources to share with you. The first one offers some general steps to using an external drive with Mac, and the second link provides steps to format the drive to work with Mac if needed.

Use external storage devices with Mac

Erase and reformat a storage device in Disk Utility on Mac

Thanks.

In addition to Sharon_419’s answer: in case you have to reformat the external drive: don’t forget reformatting wipes it completely