Flame is a Mac utility that opens a live window onto your local Bonjour network — specifically surfacing the Rendezvous services that iPhones, iPod touch devices, and other mDNS-speaking hardware broadcast every moment of the day. Think of it as X-ray vision for your Wi-Fi.
What is Flame?
Flame is a Rendezvous (Bonjour/mDNS) service browser for macOS that enumerates every network service being advertised on your LAN in real time. Where most people see only the sanitised Finder sidebar or the AirDrop sheet, Flame shows the raw fabric underneath: service types, instance names, hostnames, ports, and TXT records — the same data layer your iPhone consults every time it hunts for an AirPlay speaker, a nearby printer, or a peer-to-peer game session. It sits squarely in the tradition of the venerable Bonjour Browser and Apple's own Network Utility, but with a sharper focus on surfacing exactly what an iOS device sees on the wire.
What does Flame do best?
Flame's greatest strength is zero-configuration discovery with no command-line friction. Launch it, and within seconds a browsable list of Rendezvous service types populates the sidebar. Clicking any entry drills straight down to individual instances, their resolved hostnames, IP addresses, and raw TXT metadata — no refresh button, no setup wizard.
- Live service enumeration — entries appear and vanish as devices join or leave the network automatically.
- TXT record inspection — exposes the key-value pairs apps publish alongside their service advertisements, which is the detail you need when debugging Bonjour-enabled iOS builds.
- Type-level browsing — navigate from a broad service type like _airplay._tcp or _ssh._tcp down to a specific instance in two clicks.
- Native macOS feel — no Electron overhead; the interface sits flush with platform conventions and stays out of your way.
I've found it most useful when an iOS app I'm testing insists it can't find a local server. Pulling up Flame and checking whether the expected service advertisement is actually on the wire settles the argument in under a minute — far faster than digging through dns-sd output in Terminal.
Who should use Flame?
Flame earns its dock slot on any Mac belonging to someone who writes iOS or macOS apps that publish Bonjour services — game networking, local sync, peer discovery, AirPrint support, HomeKit accessories. If you've ever implemented NSNetServiceBrowser in an iPhone project, you already understand why a desktop-side mirror of that browser saves hours of head-scratching.
It's equally useful for home-lab administrators and network-curious power users who want a quick, readable audit of what their devices are actually shouting out. Running a Raspberry Pi bristling with services? Flame confirms they're advertising correctly before you spend an afternoon blaming the client.
Everyday users who never think about mDNS will find the information Flame surfaces abstract and uninviting. If Finder's Network section gives you everything you need, Flame is overkill — stay there.
Is Flame free?
Flame is free to download, distributed through Homebrew Cask and directly from the developer's site at movieos.org — no license key, no paywall, no subscription tier. It's a focused tool from an individual developer rather than a commercial product, which means the price is right but the support infrastructure is similarly lean.
The trade-off is that active development has been quiet for some time. Flame is stable and functional, but if you're expecting regular feature releases and a roadmap, temper those expectations. The Bonjour protocol it rides is mature and slow-moving, so the tool keeps working reliably without constant updates — but the rough edges won't be sanded down either.
What are the best Flame alternatives?
The closest rival is Discovery — DNS-SD Browser by Harald Moshammer, available on the Mac App Store. It covers the same Bonjour-browsing ground with a more polished UI and sandboxed App Store distribution — the better choice if you prefer verified provenance or want something under active development. The older Bonjour Browser by Tildesoft is another perennial that many developers keep installed for its stripped-down clarity, though it too is long in the tooth.
In the terminal, dns-sd and its Linux counterpart avahi-browse handle identical tasks with zero GUI — valid if you're already living in iTerm2. For broader network mapping that goes beyond mDNS — port scanning, device fingerprinting, SNMP — heavier tools like Network Radar or LanScan overlap at the Bonjour layer but go considerably further, at the cost of added complexity.
Flame wins on immediacy: if you only need Bonjour browsing and you want it running in ten seconds flat, nothing else is quite as friction-free.
