OpenBSD, Mac OS X, and NFS

hello everyone. I hope I recognize some of the names around here. (I posted on BSDforums a long time ago and am still around on BSDnexus forums.) anyway, on to my problem.

this is the configuration of my OpenBSD 4.3 NFS server:

rc.conf.local

portmap=YES
nfs_server=YES
mountd_flags="-n"

the -n mountd flag is supposed to "not require that clients make mount requests from reserved ports."

exports

/share 10.0.1.3

drwxrwxrwx   2 brain  brain      512 Aug 22 11:58 share/

I can mount the NFS share with mount_nfs -P crashoverride:/share /mnt on the OS X client, but without the -P flag it gives me mount_nfs: /mnt: Permission denied.

I'd like to be able to mount the share from the OS X Finder interface and I can't pass the -P flag from there. for some reason the -n flag to mountd doesn't seem to be working. there used to be a sysctl for this but it seems to be gone. any ideas?