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The Apple Support Community will permanently close on November 20, 2026. Starting today, the site will no longer accept new posts and is available in a read-only state.
You can continue to find trusted guidance and support on the official Apple Support site.
We want to thank the community members who have contributed their time and expertise to help others with their Apple products.
read only with WD passport external drive connected to imac
It means the drive came pre-formatted as Windows NTFS. The Mac can only read such a drive, unless you add third party software.
If this is only for use with the Mac, reformat the drive with a GUID partition map, and APFS as the file system.
Per chance was this drive formatted in Windows' NTFS? If so, Mac can read from drives with this format, but not write to it natively.
Make wd external drive writeable with imac
