Sometimes when transferring a file from a modern computer to a classic Macintosh (e.g., System 7), its resource fork disappears into the great aether for certain reasons. As a result, the Mac doesn’t know what type of file it is and can’t open it. Specifically, the OS needs to know the Type and Creator metadata that was stored in the resource fork.

To correct a missing resource fork, use ResEdit. But what are the correct Type and Creator entries? That’s where this table hopefully comes in handy!