macnetmon

Network interface bandwidth monitor for macOS

Split RX/TX view	Total view

About

macnetmon is a TUI (Terminal User Interface) application that displays real-time network interface bandwidth usage on macOS. It monitors incoming (RX) and outgoing (TX) traffic rates for all network interfaces with colorful visualizations.

Inspired by macmon, which monitors Apple Silicon power consumption.

Features

• Real-time network bandwidth monitoring
• Split sparkline visualization for RX/TX traffic
• Multiple color themes (7 solid colors + 10 advanced themes including Catppuccin, Dracula, Nord, Tokyo Night)
• Friendly interface names from macOS networksetup
• Toggle display of loopback, virtual, and inactive interfaces
• Sort by bandwidth or interface name
• Overview panel showing total system bandwidth
• Bits/s and Bytes/s display modes
• Persists settings (theme, toggles, interval) across runs
• 512-sample history depth

Installation

Homebrew

brew install mdsakalu/tap/macnetmon

Cargo

cargo install macnetmon

Build from Source

git clone https://github.com/mdsakalu/macnetmon.git
cd macnetmon
cargo build --release
./target/release/macnetmon

Usage

macnetmon [OPTIONS]

Options

Option	Description
-i, --interval <MS>	Update interval in milliseconds
--hide-loopback	Hide loopback interfaces
--hide-virtual	Hide virtual interfaces
--show-inactive	Show inactive interfaces
--bits	Display in bits/s instead of bytes/s
-h, --help	Print help
-V, --version	Print version

Keyboard Controls

Key	Action
q	Quit
t	Cycle through themes
g	Toggle graph (split/total)
b	Toggle bits/bytes display
s	Toggle sort (bandwidth/name)
a	Toggle “All Interfaces” panel
i	Toggle inactive interfaces
v	Toggle virtual interfaces
l	Toggle loopback interfaces
r	Refresh interface aliases
+	Increase refresh interval
-	Decrease refresh interval

Configuration

macnetmon persists settings to:

~/.config/macnetmon.json

CLI flags override saved settings for that run, and the updated values are saved back to the config.

Default interval is 1000ms if no config exists.

Requirements

• macOS (uses macOS-specific APIs via libc)
• Rust 1.70+ (for building from source)

Contributing

Contributions are welcome! Whether you have ideas, suggestions, or bug reports, feel free to open an issue or submit a pull request.

License

MIT

See Also

• macmon - Apple Silicon power monitor (inspiration for this project)