MountX is a GPL-licensed system extension which provides read-only

MountX is a GPL-licensed system extension which provides read-only
access to ext2-formatted filesystems, under MacOS 8 & 9

This software is based on e2fsprogs version 1.14, it was written by
Benjamin Herrenschmidt, the original author of BootX, a well known
Linux bootloader, for PowerPC Macs with "Old World" ROMs

From the README:

> What is MountX ?
> \----------------
>
> MountX allows your macintosh to mount MkLinux & linux-pmac ext2fs
> volumes on
> the MacOS desktop. It does it's magic by implementing an external
> file system
> following Apple's File System Manager API. The File System Manager
> is always
> available with system 7.5 and later.
>
> Since version 1.0d10, MountX checks for MacOS 8 and uses it to
> manage automatically
> the Desktop Database. That means that I didn't implement this
> support myself and I don't
> plan to do so. This also means that MountX has and will probably
> still have for some time
> some serious limitations with MacOS < 8.0
>
> MountX uses the e2fsprogs, which is distributed under the GNU
> General Public
> Licence. I am currently using version 1.14. It should work with
> both Little and
> Big endian file systems.
>
> �� WARNING !!! ��
>
> This is alpha quality software and is distributed for testing
> purposes
> only. It might crash your machine and play other kind of bad tricks
> but it
> shouldn't, or at least didn't to me at the time I released this
> version ![Wink][1]
>
> Note that this version also contains a lot of debugging code and was
> absolutely
> not optimised for performances. This will, of course, change in the
> future.

Fetched from
[https://web.archive.org/web/20000817091452/http://calvaweb.calvacom.fr/b...][2]

Compatibility
Architecture: 68k PPC

MountX does it's magic by implementing an external file system
following Apple's File System Manager API. The File System Manager is
always
available with system 7.5 and later. Therefore, this extension may not
work at all with System 7.0-7.1.2

Attempting to load this extension under System 7.6.1, running under
Basilisk, fails with the message "Your system software is too old for
MountX. You must be running MacOS 8 minimum, sorry"

[1]: http://macintoshgarden.org/sites/all/modules/smileys/packs/Roving/wink.png (Wink)
[2]: https://web.archive.org/web/20000817091452/http://calvaweb.calvacom.fr/bh40/ (https://web.archive.org/web/20000817091452/http://calvaweb.calvacom.fr/bh40/)