Name: IP Scanner Pro
Mac Platform: Intel
OS version: 10.6 or higher
1) specific optimizations for El Capitan
2) improved support for IPv6
3) updated device profiles
Courtesy of TheShark
IP Scanner for Macintosh scans your local area network to determine the identity of all machines and internet devices on the LAN. Powerful results, yet easy and intuitive to use.
IP Scanner is all about customizing the way you view your network. You may apply custom names and icons to the devices on your network and adjust the type and amount of information you see in the network overview; don't need to see the MAC address column...don't display it! Text too small...make it larger!
IP Scanner can be used in several primary modes: as a way to get a quick overview of which devices are currently on the network, including seeing which devices are actively and passively present, or view network changes over time with IP Scanner's 'cumulative mode', including options to display devices which were once present but now no longer visible.
Finally, by using the whitelist feature you may filter out known and trusted devices to reveal new or unexpected ones, a great way to easily identify unwanted network visitors.
More info: https://itunes.apple.com/app/id404167677