Why Do I Get the Error “Unable to Expand” with Archive Utility?

If you download an email validation results file using Mac OS, you may encounter the error “Unable to expand ‘file name’” with the Archive Utility.

Screenshot of the search function in Mac OS that identifies the Terminal

How to fix the “Unable to Expand” error

There are a few known fixes for this that you can implement, including this Terminal workaround in the video below: