Como Daniel Beck apontou, há o Fuse-XFS , que permite montar o XFS no OS X em somente leitura modo.
Fuse-xfs is a MacFuse (OSXFUSE) driver for XFS filesystems. This driver allows Mac OS 10.7 with OSXFUSE/MacFuse to mount XFS filesystems in read only mode.
The journal is ignored, but basic read only operations should work fine.
This software should be considered alpha, and provides no guarantees that the XFS filesystem remains unaltered (although the code does not support writing in any way). Use of the software is entirely at the users own risk.