Breaking Changes

• Added cpu_tiers to SocInfo and Metrics and vm to SocInfo in the Rust library, so code that builds these structs or matches them exhaustively needs updating; the ecpu_* and pcpu_* fields are deprecated in favor of cpu_tiers (#85, #100)

Features

• Added support for the three CPU tiers of M6 Macs, with per-tier CPU metrics in JSON (cpu_tiers) and Prometheus (macmon_cpu_tier_*) (#85)
• Added an info overlay (i) with the working directory, open files and sockets of the selected process, grouped by type and filterable (#95, #97)
• Added killing the selected process with k, with Terminate and Force kill (#89)
• Added revealing the selected process or file in Finder with e and copying its path with c (#95, #98)
• Added several terms to the process filter, ! to exclude matches, and a total row for each term (#86)
• Added a sortable CPU time column (TIME) to the process list (#104, #105)
• Added a total power box with fan speed to the power row (#94, by @NicholasClooney)
• Added scrollbars to the process list, the info overlay and the help (#98, #104)
• Added support for running in a macOS virtual machine, where unavailable power and frequency readings are hidden; the soc JSON object gains vm (#99, #100)

Fixes

• Fixed processes of the nobody user missing from the process list (#104)
• Fixed the base M5 Efficiency cores being labeled P instead of E (#85)
• Fixed CPU core counts in macmon debug on macOS 27 (#85)

Improvements

• Reduced the TUI's own CPU usage by about half with the process list shown (#103)
• Made key hints easier to read in both light and dark terminal themes (#92)
• Updated the Grafana dashboard to plot per-tier CPU metrics; it needs this version's exporter (#85)

Full Changelog: v0.9.0...v0.10.0

Latest build of main at a09a8a6 (2026-10-14 22:36 UTC).

Features

• Restored power readings on supported Macs running macOS 27 without requiring sudo
• Redesigned the TUI and added a sortable, filterable process list with CPU, GPU, memory, and power usage
• Added stress ane for Neural Engine load testing and included ANE workloads in stress all
• Added stress all --pulse [SECONDS] to alternate all workloads between busy and idle periods
• Added find-clpc to diagnose CPU, GPU, and ANE power counters, with optional comparison against Apple's powermetrics

Fixes

• Fixed CPU and GPU frequency detection on M6 Macs (#79, by @johntdavies)

Breaking Changes

• Changed cpu_temp_avg and gpu_temp_avg in TempMetrics from f32 to Option<f32>; unavailable temperatures now appear as null in JSON instead of 0.0. Unavailable temperature metrics are omitted from Prometheus output (#81, by @omar16100)

Full Changelog: v0.8.2...v0.9.0

Fixes

• Fixed a regression that caused missing per-core CPU metrics on M3 Ultra systems (#55)

Full Changelog: v0.8.1...v0.8.2

Features

• Added selectable pulse, CPU, GPU, and combined stress modes with an interactive terminal progress indicator
• Added a TUI toggle between frequency-scaled and active-residency usage views
• Added an optional app feature so Rust library users can exclude CLI and TUI dependencies with --no-default-features

Fixes

• Fixed CPU usage ratios when hardware samples omit inactive cores
• Restored v0.7 JSON and Prometheus metric names as compatibility aliases
• Fixed server startup output to report the actual bound address

Full Changelog: v0.8.0...v0.8.1

Breaking Changes

• Narrowed the public Rust library API to hardware sampling types; App, Config, ViewType, and zero_div are no longer exported

Features

• Added a toggleable detailed per-core CPU view and exposed per-core CPU metrics (by @it7760)
• Added named aggregate frequency and effective-usage metrics, plus CPU and GPU active residency ratios (#61)
• Added fan speed and fan name metrics to JSON and Prometheus output (#64, by @chodorenko)
• Added a --host option for the metrics server and its launchd service (by @claytono)
• Added a stress command with cyclic CPU and full CPU/GPU load modes

Fixes

• Fixed RAM and swap gauge labels becoming unreadable at higher usage
• Fixed the TUI showing an empty swap section when swap is unavailable
• Fixed Prometheus chip labels containing special characters

Improvements

• Improved Sampler::get_metrics to collect complete caller-scheduled intervals with faster startup (#60, by @homm)
• Sped up hardware detection

Full Changelog: v0.7.2...v0.8.0

Fixes

• Fixed sparkline chart rendering gaps in Apple Terminal
• Fixed frequency scale on MacBook Neo (#57)

Full Changelog: v0.7.1...v0.7.2

Fixes

• Fixed CPU usage always showing 0% on Ultra chips (M1/M2/M3 Ultra) (#55)
• Fixed GPU temperature sometimes reporting bogus values (#54, by @gtalusan)
• Fixed potential data race when sharing metrics between threads
• Fixed memory size showing 0GB on systems with 256GB or more RAM

Full Changelog: v0.7.0...v0.7.1

Features

• Added HTTP server mode with JSON and Prometheus metrics endpoints (#34, #53)
• Added launchd service install/uninstall commands for the HTTP server (#34)
• Added cpu_usage_pct metric (#28)
• Added RAM usage percentage display in the label (#31)
• Exposed macmon as a library crate for programmatic use (#52, by @tasleson)

Fixes

• Fixed crash on Apple M5 Max due to renumbered voltage-states keys (by @swiftraccoon)
• Fixed processor count parsing and dynamic E/P/S core labels on M5 (by @swiftraccoon)
• Fixed bogus sensor temperature readings being included in averages (#50, by @gtalusan)

Docs

• Added Nix installation instructions (by @thibmaek)

Full Changelog: v0.6.1...v0.7.0

Features

• Added SoC info output in pipe/JSON mode via --soc-info flag (by @aliasaria)

Full Changelog: v0.6.0...v0.6.1