Netfox

Netfox is a native macOS application that monitors your home network. Every connected device, when it joined, and what’s new — at a glance. No cloud account, no telemetry, no router-vendor lock-in.

What it does

• Live device list — every machine on your network, with hostname, MAC, vendor, IPv4/IPv6, and online state
• Multi-source discovery — Bonjour/mDNS, the system ARP cache, and active ICMP probing run together. Apple devices, dumb IoT, quiet hosts — all in the same list
• Per-device history — first seen, last seen, every transition (online ↔ offline, IPv4 learned/changed, hostname changed, vendor learned, kind refined) on a timeline that survives across launches
• New-device alerts — both as an in-app inbox (the bell in the toolbar) and as native macOS notifications. Persistent log of everything that ever fired, viewable from View → Alert History… (⌘⇧A)
• Probe on demand — manually re-check a specific device with Probe This Device from the context menu, instead of waiting for the next discovery pass
• Smart context menus — copy any field, jump to history, probe a single device
• This Mac, pinned — the Mac running Netfox is always at the top of the sidebar, with its current Wi-Fi/Ethernet connection state
• No account, no cloud, no telemetry — every observation lives on your Mac
• Universal binary — runs on Apple Silicon and Intel Macs; macOS picks the right slice at launch
• Auto-updates — built in, signed with EdDSA

Requirements

• macOS 15 (Sequoia) or later
• A local network — Wi-Fi, Ethernet, or anything macOS reports as an interface with a subnet

See Getting Started for first-launch notes.