AI-generated editorial illustration; not a documentary photograph.
Dave Plummer, who created the original Windows Task Manager, has released TMOG, a cross-platform system-monitoring utility now in beta for macOS, Windows and Linux. The project was built with help from Claude Code and began with a 107-page specification, according to Engadget’s report.
A new Task Manager
TMOG is intended to help users diagnose slowdowns by placing whole-machine history alongside individual process activity. Its 12 views cover areas including process resources, startup apps, services, power and frequency, network connections, installed applications, disk space and benchmarks.
Native builds across three systems
The application uses a shared C++ core while relying on platform-specific technologies: Swift and AppKit on macOS, Direct2D on Windows and Qt 6 on Linux. It can also monitor its own resource use. Status meters update at 60Hz, and efficiency cores receive separate colors. Retro phosphor themes are available in green, amber and blue.
Free monitoring, paid history
The free edition provides live system and process monitoring on all three platforms. The Pro tier adds Flight Recorder, which records activity for later replay so users can inspect what happened during a slowdown. Pro costs $39.95 and is sold through Plummer’s Lemon Squeezy store.
Still a beta
The macOS beta arrived on July 31, followed by Windows and Linux builds on August 23. The third iteration and first Pro builds appeared on September 7. Engadget reports that the software remains in beta and that early adopters are still finding bugs. On macOS, the app cannot be sold through the App Store because Apple’s sandboxing rules prevent the required system-process access, according to Plummer.
Source: The creator of Windows Task Manager has 'vibe coded' a new version that runs on macOS and Linux
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