Epson WorkForce 520 series - Manual (Page 23)

Wired (Ethernet) Network Setup 23
6. When you see this screen, select The printer is already on my Ethernet
network , then click Next .
7. Mac OS X 10.6: Skip to step 14 on page 24.
8. Wait while the software is installed, then click Next to start network
installation.
9. When you see the Firewall Warning screen, click Next .
Note:
If you see a firewall alert message, click Unblock or Allow to let EpsonNet Setup
continue. Do not select Ask Me Later, Keep Blocking, or Block.