LanScan 8.2.17 for macOS

This release of LanScan is a maintenance update, keeping the tool solid on current versions of macOS. Under the hood, it's the same practical scanner I've relied on when a client calls and says, "Something's chewing up all the bandwidth."

1. Pick your range. Tell LanScan which part of the network to look at—from a single subnet to the full IPv4 address space. For the local network, it uses ARP packets to stay fast and quiet.
2. Run the scan. Hit go and LanScan gets to work, using Ping, SMB, and mDNS to identify everything with a pulse. Devices pop up in a clean list showing IP address, MAC address, host name, and vendor.
3. Make sense of the results. A single device can show up to four host names. If a name doesn't make sense, double-click it and type in something you'll actually recognize next week. Add a custom comment for each entry—perfect for noting which Raspberry Pi runs the sprinklers.
4. Tidy up. Right-click the column headers to hide or show whatever you don't need. Once you've got the view you like, you can open a custom URL in your browser straight from a discovered device.

LanScan runs natively on both Apple Silicon and Intel Macs. It isn't trying to impress anyone with flashy dashboards. It finds devices, names them sensibly, and gets out of your way.

First days with LanScan

After you drop the app into Applications and launch it, resist the urge to scan everything at once. Start with your home subnet so you can learn what a normal result looks like. That baseline matters later, when a stranger pops up in the list and you need to know whether it's a neighbor's printer or something worth investigating.

• Give host names a day to settle. LanScan pulls from DNS, mDNS, and SMB, but not every device answers right away. Run a second scan in the evening and you'll often see names that were missing in the morning.
• Use comments early. Even if it's just "living room Apple TV" or "old NAS in the closet," a note you type today will save you from scratching your head in a month.
• Keep one CSV export. Before you make changes to the network, save a scan to CSV. When something breaks later, you'll have a snapshot of what was there before.
• Watch the column alignment. If you're comparing MAC addresses across two scans, aligning the MAC column left or right makes the differences much easier to spot at a glance.

Scans finish while you grab a refill

On both Apple Silicon and Intel machines, LanScan starts quickly and doesn't sit around using memory when it's not scanning. A local subnet scan finishes in the time it takes to refill a coffee mug. Public range scans take longer, naturally, but the interface stays responsive while packets are flying—you can scroll through results and open the detail for a device without the app stalling.

I haven't seen it beachball during a scan, even on an older Intel MacBook Air with a modest amount of RAM. The app feels light because it is light. It doesn't install background helpers or launch agents, so it won't nibble at your battery or show up in the menu bar when you're not using it.

If you're hunting for a straightforward lanscan dmg to keep on a USB stick for house calls, this one fits the bill. The install is a simple drag-and-drop, and the app behaves the same whether you run it fresh or from a copy that's been sitting in your tools folder for six months.

• macOS 11 or later
• Works on Apple Silicon and Intel 64-bit Macs