A guided TFTP Server recovery tool for macOS
If TFTP recovery failed once, stop and check the environment before another blind retry.
TFTP: a simple local file-transfer method. In recovery, the router may ask your Mac for one firmware file.
Recovery mode: a temporary rescue state used when the router cannot start normally. It usually exposes only the basics needed to accept firmware.
Bootloader: the small startup program that runs before the normal router system. Many recovery flows are controlled by it.
Static IP / same subnet: a temporary Mac address such as 192.168.1.254 so the Mac can talk to a router waiting in recovery mode.
What to do: check the router label and hardware revision, then download matching recovery firmware. Why: mismatched firmware is a common cause of failed recovery. You should see: a filename, model, and hardware revision that clearly match.
What to do: temporarily set the Mac Ethernet IP to the address required by the guide, such as 192.168.1.254. Why: this lets the Mac communicate with the router while it is in recovery mode. You should see: Ethernet connected, with the Mac IP and router recovery IP in the same local network range.
What to do: select the firmware file and let Router Recovery wait for the router request. Why: the router recovery window may be brief, so the Mac should be ready first. You should see: the app waiting for the router request or showing that a request was detected.
What to do: follow the model guide, usually power off, hold Reset or WPS, then power on. Why: the router must enter recovery mode before it can request or accept firmware. You should see: the documented LED pattern, a brief network response, or the app detecting a firmware request.
If your Mac is still on DHCP, Wi-Fi, or another subnet, the router may never reach it. Set the active Ethernet adapter to the IP required by the recovery guide.
Button timing matters. Some routers require holding Reset, WPS, or another button while powering on, and the recovery window may be short.
A sysupgrade image, factory image, recovery image, and vendor firmware file are not always interchangeable. Use the image type your model requires.
Some bootloaders request an exact filename. Rename the file only if the model instructions require it, and avoid hidden extensions such as .bin.zip.
The file must be inside the folder served by the app. If the app is serving a different folder, the router request will fail.
Temporarily allow the app or TFTP traffic during recovery. Re-enable normal firewall settings after testing.
Use a direct Ethernet connection when possible. Try another LAN port if the recovery guide names a specific port or the link light never appears.
The router may not be in recovery mode, the Mac IP may be wrong, or the firmware file cannot be found in the served folder.
You can temporarily allow the app or TFTP traffic for testing, then restore your normal firewall settings.
No. Recovery depends on device model, firmware file, and bootloader behavior. The app helps prepare and check the TFTP Server environment.