If you connect your WD hard drive without reformatting, you’ll be unable to copy files to the disk as Mac read only supports NTFS file system. I wonder whether I can just use it with Mac directly or need to reformat it for Mac? If the WD Elements drive needs reformating for Mac? If it is necessary to reformat the hard drive, what kind of file system should I reformat it as? Can I format it for Mac on PC? Need to reformat WD hard drive for Mac Now, I need to use it with my Mac to save some files. “I have a 1TB WD Elements Portable USB 3.0 hard drive, formatted with NTFS and used with PC running Windows 10. Can I reformat WD hard drive for Mac on PC?