Can I share network access from Ethernet over WiFi?
It sounds like you are looking to share your ethernet connection to Wi-Fi devices, this is possible although there is an exception where your ethernet connection implements authentication, but your Mac will state this.

To get started:


Open System Preferences
Navigate to Sharing
Enable Internet Sharing (left hand list)
Set the "Share your connection from:" dropdown to your ethernet port
Check the "Wi-Fi" option in the list "To computers using:"
Click "Wi-Fi Options" and configure the options for the network you'd like to create
Press "OK"


Now try connecting a device to the newly created Wi-Fi network.