A tiny, native macOS menu bar app that shows your real-time network upload/download speed — no Electron, no third-party dependencies, just Swift + AppKit.
- Live download (green) / upload (red) speed in the menu bar, fixed-width so it never jitters
- Click to open a popover with:
- Current speed
- Top apps/processes currently using the network (
App | Down | Up), with app icons
- No Dock icon, lives entirely in the menu bar
- Per-app network breakdown only polls while the popover is open, to keep idle CPU/overhead near zero
- Pure AppKit — no SwiftUI, no Charts, no third-party dependencies at all
- macOS 12+
- Xcode Command Line Tools (
xcode-select --install) — no full Xcode or extra dependencies needed
git clone https://github.com/jodacame/NetSpeed.git
cd NetSpeed
swiftc main.swift -o NetSpeed -framework Cocoa -O
./NetSpeedTo have it start automatically at login, add it as a Login Item in System Settings → General → Login Items, pointing to the compiled NetSpeed binary.
- Total throughput is read straight from interface counters via
getifaddrs(en*/utun*interfaces), sampled every second. - Per-app breakdown shells out to the built-in
nettopcommand-line tool (no sudo required) and diffs per-process byte counters between polls to compute a rate. - The popover UI is built with plain
NSView/NSStackView/Auto Layout — no SwiftUI — to keep the dependency surface as small as possible.
MIT — see LICENSE.
Disclaimer: this tool was built through AI + human collaboration. It's a personal utility I made for my own use, and I'm keeping this repo as a backup for the future and sharing it with the community in case it's useful to anyone else looking for something simple.