[PROBLEM] connecting to SMB server: "operation not permitted"

[mk01]

btw: OSX still has nfsd support (although not turned on by default)

put this to your /etc/exports file on Mac:
"
/ -alldirs -mapall=0
"
then from command line (terminal) issue this command "sudo nfsd start" or "sudo nfsd enable" if you want the change permanent.
but be careful, -mapall=0 means, all access will be provided under root user with RW access to everything.

you can then mount this directly to your RPI as local folder "mount -t nfs [yourmacip]:/ /media/my_mac".

if you wan't to access this share from xbmc rather than mounting on system level, you have to put "-N" parameter to nfsd plist file. you can google this or look for info directly at xbmc.org.