How to Change IP Address on macOS for Use With ETC Networks

1. Close any ETC software you are currently using.
2. Click on the Apple Logo in the upper-left corner then select System Preferences.

3. Select Network within System Preferences

4. Select the Ethernet Interface you are using to connect to your lighting network. If you are using a Thunderbolt to Ethernet or other variety of adapter, this may not be labeled "Ethernet" as depicted below but it will still have the Ethernet logo shown below.

If you are not an Admin on your computer, you may need to click the lock in the lower-left hand corner and authenticate with an Admin username and password to change these settings.

5. If you do not have a DHCP server on your network, the IP Address line above may be blank or may contain an IP address that begins with 169.254. To set a manual IP address, expand the Configure IPv4 drop-down and select Manually. 
6. Enter a unique IP address that is in the same subnet as other devices in your lighting network. ETC devices typically live in a subnet of 10.101.x.x with a 255.255.0.0 subnet mask on 10.101.1.1 Gateway (or Router on Apple devices). You may want to check the IP address of another device on your network to confirm they are in that subnet. When assigning a manual IP to a third-party computer, ETC recommends using an IP anywhere from 10.101.1.101 to 10.101.1.252.
7. Click the Apply button in the lower-right corner to confirm your changes.