And, JFWIW, Mac's UFS supports Inferno-for-OS X just fine. So AFAIK, a Mac with one or more UFS partitions might not have as great a need for FUSE.
I really think it has the need. The main point is that files from the inferno are not real files, they provide services instead. So, to make those services available for the mac, I mount in macos inferno file trees.
