Menu bar tool for macOS shows real-time CPU, GPU, memory, disk, network, battery status, sensor data, fan speed, Bluetooth device info, multi-time zone clocks, customizable widgets, and historical graphs while ensuring privacy.

There are many alternatives to iStat Menus for Mac if you are looking for a replacement. The best open source Mac alternative is Stats. If that doesn't suit you, our users have ranked more than 50 alternatives to iStat Menus and 14 are open source and available for Mac so hopefully you can find a suitable replacement. Other interesting open source Mac alternatives to iStat Menus are MacThrottle, iGlance, SwiftBar and XRG.
Menu bar tool for macOS shows real-time CPU, GPU, memory, disk, network, battery status, sensor data, fan speed, Bluetooth device info, multi-time zone clocks, customizable widgets, and historical graphs while ensuring privacy.

Lightweight macOS tool that tracks thermal pressure and throttling, shows real time CPU temperature and fan speed, provides 10-minute history graphs, statistics for thermal states, and customizable notifications, all without requiring administrator privileges.

macOS and OSX tool showing real-time CPU, memory, network activity, fan speed, and temperature in the menu bar. Highly configurable, with customizable battery notifications, support for light or dark mode, open-source code, and ongoing community-driven updates.

XRG is an open source system monitor for Mac OS X. XRG allows you to monitor CPU activity, memory usage, battery status, machine temperature, network activity, disk I/O, current weather, and stock market data.




macOS menu bar utility written in SwiftUI that presents CPU, memory, disk, and network usage, plus Bluetooth battery levels, customizable Big Sur widgets, Dark Mode, and real-time sensor data. Open-source, lightweight, and compatible with Apple Silicon.

Track Mac fan speed, target speed, minimum and maximum speeds, number of fans, and CPU or GPU temperature in real time from the Notification Center or Menu Bar using a compact widget designed to provide hardware stats without workspace clutter.

Nerdtool allows you to display many things directly on top of your desktop; weather reports, headline news, and system vitals are just a few uses.



ZetaWatch is a small OS X program that displays the zfs status in the menu bar, similar to what iStat Menus does for other information. It is fairly well tested, but due to the current state of libzfs and libzfs_core, changes will be required until the API stabilizes.

Your iPad and iPhone show you when apps are using your network. So why can't your Mac? Sure, there's always the Network section in Activity Monitor, but that's far from ideal. At best you can group by All Processes, Hierarchically, sort by Rcvd Bytes, and check the...


It provides many of the same features and is open source