====== TFTP on macOS ======

===== Client =====

Before entering tftp, change your directory in terminal where the file you want to push is sent.

<code>
tftp 192.168.x.x
</code>
Prompt switches to tftp>
<code> 
bin
# sets tftp to binary mode
trace on
# gives you verbose output
put [firmware file]
</code>

===== Server =====

The server is disabled by default.

Starting the tftp server
<code>
sudo launchctl load -F /System/Library/LaunchDaemons/tftp.plist
</code>

Stopping the tftp server
<code>
sudo launchctl unload -F /System/Library/LaunchDaemons/tftp.plist
</code>

Check the process to ensure the server is running. If there is a blank response, server is not running.
<code>
netstat -atp UDP | grep tftp
</code>

The tftp server uses /private/tftpboot as its default folder. You can use command+shift+g to enter the path directly. Any files you wish for the client to receive, you must move the files there.
<code>
cp filename /private/tftpboot
</code>

Since the folder is restricted, you need to set the correct permissions on the file.
<code>
chmod -R 766 /private/tftpboot
</code>

There is a gotcha with the TFTP daemon, which is you cant copy a file to the TFTP daemon if that file does not already exist there.  To work around it you can just create a file and set the permission for it. Then your devices will just send data into the pre-created file.

### Create the file
touch /private/tftpboot/FILENAME
### Set permissions
chmod -R 766 /private/tftpboot