Filesystem that both FreeBSD and OS X can read/write

[mal content]

Hello.

I have a small USB hard disk enclosure and would like to start
using it to transfer files between OS X and FreeBSD machines.

Is there a filesystem that both OS X and FreeBSD can reliably
read and write to? I've heard that OS X supports UFS, but there's
no clear definition on what UFS actually is. I mean Free/Open/Net/
DragonFly all seem to have slightly differing definitions...

Any ideas?
MC

(please cc: as I'm not subscribed)