.RSET File

The rset file extension is associated with the Apple Extensions Manager, a part of earlier versions of Mac OS (System for Mac, Mac OS Classic).

Probably no longer used file format.

This rset file type entry was marked as obsolete and no longer supported file format.

This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.

How to open:

Probably not meant to be accessed by the user.

How to convert:

Probably cannot be converted to anything else.