The best system monitors for Mac in 2026
Six monitors worth running on an Apple Silicon Mac, from the polished paid classic to free menu bar apps and a terminal dashboard. What each one shows, what it costs, and who it suits.
Updated
- 2
Best for Anyone who wants free, open-source readouts in the menu bar, on Intel or Apple Silicon.
- CPU, GPU, memory, disk, network, battery, sensors, Bluetooth and clock modules.
- Free, MIT licensed, frequent releases and
brew install stats. - Supports macOS 12 and later, on Intel as well as Apple Silicon.
- Fan control is in legacy mode with no fixes, per its own README.
- The README notes the Sensors and Bluetooth modules are the most resource-hungry; turn them off if you don’t need them.
- No long-term history, no developer-specific views.
- 3
Stat SpaceOurs
Best for Developers on Apple Silicon who want system stats plus ports, AI agents and orphaned processes in one menu bar item.
- Everything Stats shows is free, plus 30 days of per-minute history.
- Helpers grouped into their app, listening ports traced to project and launcher, agent sessions and leftovers.
- Idles under 0.3% CPU and about 21 MB of RAM, and shows its own cost live.
- A
statspaceCLI and MCP server for scripts and agents.
- Apple Silicon (M1 and later) and macOS 14+ only. No Intel.
- Closed source, and not on the Mac App Store.
- No disk benchmark or uninstaller.
- 4
Best for People who want a monitor bundled with maintenance tools: cleaner, uninstaller, drive health.
- Menu bar monitor plus a full dashboard for CPU, GPU, battery and storage.
- Drive S.M.A.R.T. analysis, disk benchmark and a TRIM switch.
- App uninstaller and junk cleaner in the same app.
- Paid, and much of the app is maintenance rather than monitoring.
- More app than you need if you only want menu bar readouts.
-
Best for Per-process detail, sampling a hung app, and the Energy tab. It’s already on your Mac.
- On every Mac, nothing to install or trust.
- Sample a process, see its open files and ports, and its parent.
- Energy impact and 12-hour power per app.
- Lives in a window, not the menu bar.
- Shows every helper separately: Chrome is twenty rows, not one.
- No temperatures, fans or battery health.
- 6
Best for Terminal people who want a full-screen dashboard over SSH or in a tmux pane.
- CPU, memory, disk, network and a sortable process list in one terminal view.
- Install with
brew install btop; costs nothing once you close it.
- Only shows anything while it’s open in a terminal.
- No menu bar presence, alerts or history.
How we chose
Every pick runs natively on Apple Silicon, is maintained in 2026, and shows at least CPU, memory and network. We looked at what each one shows, what it costs to buy, and what it costs to run, since a monitor sits on your Mac all day. We left out apps whose last release predates Apple Silicon, and apps that need a subscription just to see CPU usage.
Which one should you pick?
- You want the best general-purpose monitor and will pay: iStat Menus. It’s been refined for years, and weather, calendar and S.M.A.R.T. are all in one place.
- You want free and open source: Stats. It covers the basics well and runs on Intel Macs too. Our iStat Menus vs Stats comparison goes module by module.
- You build software on an M-series Mac: Stat Space. The free tier matches Stats, then adds the questions developers actually ask: what’s on a port, what your AI agent left running, and why the Mac won’t sleep.
- You also want a cleaner and uninstaller: Sensei.
- You only look occasionally: Activity Monitor or btop. Both cost nothing when closed.
The built-in way
If you just need numbers once, Terminal has them:
# Top 10 processes by CPU, sampled twice, 2 s apart
top -l 2 -s 2 -o cpu -n 10 -stats pid,command,cpu,mem
# Memory pressure and swap
memory_pressure | tail -1
sysctl vm.swapusage
# Power and thermal pressure on Apple Silicon (needs sudo)
sudo powermetrics --samplers cpu_power,thermal -i 1000 -n 1
The first top sample always shows 0% CPU for everything, which is why it takes two. For per-app detail, Activity Monitor’s CPU Time column is often more honest than the live % CPU: it shows what has been busy all day, not just this second. Our guides on high CPU usage and memory pressure walk through reading these.
Where Stat Space fits
We make Stat Space, so take this with that in mind. It’s a strong fit if you run dev servers, Docker and coding agents, and want one menu bar item instead of three. It’s the wrong pick on an Intel Mac or anything older than macOS 14, and if open source is a requirement, Stats is the honest answer.
We make Stat Space, so weigh our pick accordingly. Prices and features as of November 2026; spotted something out of date? Email [email protected].
Questions
Does macOS have a built-in system monitor?
Yes. Activity Monitor (in Applications › Utilities) shows CPU, memory, energy, disk and network per process. It has no menu bar readouts or temperatures; for those you need a third-party app.
Which Mac system monitor is free?
Stats and Stat Space are both free menu bar monitors, and Activity Monitor and btop are free too. iStat Menus and Sensei are paid. See our [free system monitor roundup](/best/free-mac-system-monitor).
Do system monitors slow down a Mac?
A good one costs well under 1% CPU at idle. Cost goes up with the sampling rate and with expensive modules like sensors and Bluetooth, so turn off what you don’t look at.
Can I see Apple Silicon temperatures without an app?
sudo powermetrics --samplers thermal reports the thermal pressure level, but not per-sensor temperatures. For degrees you need an app that reads the SMC or HID sensors.
Know what your Mac is doing, without adding to it.
Free, no account. Pro is $9.99 once for the first 100 buyers.