Mac
a. Go to System Preferences -> Network.
b. Chooose Ethernet -> Advanced -> TCP/IP.
c. In Configure IPv4, choose Manually.
d. Set the IPv4 Address to 192.168.1.2 manually.
6. Use Firefox or Chrome to visit http://192.168.1.1.
7. Click Choose File to find the firmware file. Then click Update firmware.
For GL-AR300M, GL-AR300M-Ext, GL-AR750S-Ext, please download the .img
firmware file and upload to the NAND