OSX Built-in TFTP Server
OSX has a built-in TFTP server, but starting it the OSX way may not be 100% obvious to you.
sudo launchctl load -F /System/Library/LaunchDaemons/tftp.plist sudo launchctl start com.apple.tftpd
The default TFTP path is
Stopping it is the reverse of the first step.
sudo launchctl unload -F /System/Library/LaunchDaemons/tftp.plist