Can WD Passport Essentail be used for PC and MAC?

WD External Drives External Drives for Mac
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If it was working on your Mac then right now it -is- HFS+, but if you want to manually format it again click on go> utilities> disk utility> click on the drive itself> click on partition> set the volme scheme for one partition if you want the full capacity on a single volume> click on options> Check Apple Partition Map if you’re on a G4/G5, or check GUID Partition Table if you’re on an Intel-based Mac> Type the name you want in th upper-right corner> The format will be automatically set to Mac OS Extended (Journaled), which is HFS+> Click on Partition/Apply in the lower-right.