Mac mini server be a wireless AP

1.
Open serveradmin 

select overview => Gateway Setup Assistant


press ethernet => continue => and check the airport to combine the to network interface via NAT.

if you do not need the proxy server then press continue to skip the step.


2.
Open network preferences


Create Network


And the icon will appear like this






The NAT is unstable.

so you may use command to restart it by forcing

#sudo launchctl unload -w /System/Library/LaunchDaemons/com.apple.natd.plist




#sudo launchctl load -w /System/Library/LaunchDaemons/com.apple.natd.plist

3.
In your client Macbook series, you must use the Network preferences via Assist me to join the

Miniserver wireless AP. And the icon is same pic upside.

But the others iOS devices just open wifi and join it.

At lease, you can let your MacMini Server been a wireless AP via NAT DHCP and DNS.

notice: Please do not forget open the firewall DHCP port on your MacMini Server