System file
What is a .mfs file?
A .mfs file is a Macintosh File System. This is a system or support file. Your computer uses it in the background — it isn't a document.
How to open a .mfs file
- Usually nothing. These files are read by the operating system or an application, not by you.
- If it's plain text (settings, logs), a text editor will show its contents safely.
The registry records this extension against Macintosh File System, so software from that family is the most likely match.
How to convert a .mfs file
- System files shouldn't be converted. If a program is complaining about one, reinstalling that program is the usual fix.
The technical record
For archivists, developers and the merely curious: these are the PRONOM registry entries for .mfs.
| Format name | Version | MIME type | PUID |
|---|---|---|---|
| Macintosh File System | — | — | fmt/2068 |