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cannot write to external drives on Mac no matter what format it has

I bought a new USB drive and discovered that it's always read-only, no matter what format I give it. I tried to format it with FAT32 or Mac OS Extended (Journaled), but it made no difference. An old USB drive, which I previously wrote files to, is also read only on this Mac. Any advice?

Best Answered by

iBoysoft author Jenny Zeng

Jenny Zeng

Answered on Friday, June 14, 2024

Since both your new and old drives are read-only on Mac, even with a file system that has read/write access on Mac, I suspect your Mac is managed by your organization, and there's profile on your Mac that prevents writing data to any external drives.

To verify the assumption, press Command + Space and search for "System Information." Then go to Software > Managed Client to see if a profile exists.

If that's the case, you'll need to contact the IT department to change it.


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