> is there support for read/write HFS+

"L/HierarchicalFileSystem [NEW] Read-only filesystem for Mac HFS+ disks (only data fork is supported)"
http://www.morphos-team.net/releasenotes-2.3.html

> and/or Unix FS?

What's "Unix FS"? There are filesystem handlers for SGI-XFS and EXT2/3.