Sajnos nem jutottam előbbre :(
ibook:~ fifi$ ls -la /Library/StartupItems/
ibook:~ fifi$ ls -la Library/StartupItems/
ls: Library/StartupItems/: No such file or directory
ibook:~ fifi$ ps aux | grep -i wlan
fifi 319 0.0 1.0 99864 6796 ?? S 2:57PM 0:15.05 /Applications/Utilities/WLan.app/Contents/MacOS/WLan -psn_0_1441793
fifi 570 0.0 0.0 18052 244 p1 R+ 4:37PM 0:00.01 grep -i wlan
ibook:~ fifi$ file /Applications/Utilities/WLan.app/Contents/MacOS/WLan
/Applications/Utilities/WLan.app/Contents/MacOS/WLan: Mach-O universal binary with 2 architectures
/Applications/Utilities/WLan.app/Contents/MacOS/WLan (for architecture ppc): Mach-O executable ppc
/Applications/Utilities/WLan.app/Contents/MacOS/WLan (for architecture i386): Mach-O executable i386
ibook:~ fifi$
Szóval az általad említett katalógusok üresek, ami fut, az meg egy bináris.