If the output doesn’t look up to date, or if it’s missing an IP you believe should be there, ping the broadcast IP (typically the last result of arp -a ending with “.255”), then run arp -a again like so. ? (192.168.0.255) at ff:ff:ff:ff:ff:ff on en0 ifscope How to Find IP Addresses of Devices on a Local Network with ping & arp (For the latter, you can help distinguish hardware by matching them up to the MAC address found in MacOS X or in iOS).Īn example of arp -a output looks like this: This will return devices found on the local network, including other Macs, PCs, routers, iPhones, and iPads, displaying both their LAN IP address as well as their individual MAC address. For the purposes we want to achieve here, the most simple use of arp is with an -a flag attached: The arp tool is uses ARP (Address Resolution Protocol) to display and control network address resolution functions. To get started, launch the Terminal app from /Applications/Utilities/ (or accessed with Spotlight and Command+Spacebar).

T mac 3 2016