Counters, not contents
It reads byte counters from the kernel. It never looks inside your packets.
See what your Mac
is talking to.
Every connection of every process, with live bytes, domain names and a world map. Plus every open port.
macOS 14 or later · Local-only
▾ Google Chrome Helper PID 43350 ↓ 1.2 MB/s ↑ 40 kB/s 13
142.250.74.78:443 www.google.com ↓ 12.1 MB ↑ 1.9 MB TCP ESTABLISHED
[2606:4700::6812:202f]:443 chatgpt.com ↓ 3.3 MB ↑ 610 kB TCP ESTABLISHED
unconnected UDP ↓ 3.3 MB ↑ 1.7 MB UDP
▸ macOS processesLike Activity Monitor, but for the network.
Live connections, a world map and open ports, refreshed every second. Plus domain names and traceroute.
01
Activity
See which remote endpoints every process talks to, with bytes per connection and per process, and the domain names behind the IPs. Root daemons included, no root needed.
Learn more →02
World map
The same connections on a dotted world map: arcs from home, packets flowing in and out, blips sized by traffic. Lookups never leave your Mac.
Learn more →03
Ports
Every listening TCP and bound UDP port, the process and user that own it, and whether it is reachable from the network or only from localhost.
Learn more →Private by design
A network monitor should be the last app leaking your data.
Nothing leaves your Mac
No connection data is written to disk or sent anywhere. No account, no telemetry.
Network only when you ask
The app makes a network request only when you explicitly ask it to.
Domain names, opt-in
An optional helper reads DNS answers only, so you see google.com instead of 142.250.74.78.
Questions
What is LightAtom?
A network monitor for Mac. It shows every connection of every process — the remote address, port, protocol, live bytes and the domain name behind it — plus a world map of where your traffic goes, every open port, and traceroute.
How is it different from Activity Monitor?
Activity Monitor’s Network tab shows how many bytes each process sends and receives. LightAtom shows where they go: which servers, which domains, which ports and which countries.
Does LightAtom block connections?
No. It shows what your Mac connects to and leaves blocking to a firewall such as the built-in macOS firewall, LuLu or Little Snitch. It works alongside any of them.
Does it read the contents of my traffic?
No. It reads per-connection byte counters from macOS. The optional domain-names helper reads DNS answers only, so it can show names like google.com instead of bare IP addresses.
Does it send my data anywhere?
No. There’s no account and no telemetry, and connection data isn’t saved or uploaded. The app only uses the network when you run a traceroute or turn on reverse DNS.
Does it need administrator rights?
Not for connections, the map or ports. Domain names need a small helper that you approve once in System Settings › General › Login Items.
Which Macs does it run on?
Macs running macOS 14 Sonoma or later.
Know your network.
LightAtom for macOS.
macOS 14 Sonoma or later