Starting a tftp server in OS X Leopard
Copy the file you wish to serve to:
/private/tftpboot
Then:
sudo launchctl
From the launchd% prompt run:
load -F /System/Library/LaunchDaemons/tftp.plist
start com.apple.tftpd
And when you’re done using the server just:
stop com.apple.tftpd
unload load -F /System/Library/LaunchDaemons/tftp.plist