Sensei 2.1.2 — Mac version

Sensei runs on any Mac with macOS 14 or newer, Intel or Apple Silicon.

Dashboard — the main window shows live graphs for CPU, GPU and RAM use, plus disk activity.
Battery health — track cycle count, capacity and temperature so you know when a replacement might be due.
Fan control — set a custom curve or let the app manage cooling based on your own rules.
TRIM support — enable TRIM on third-party SSDs to help maintain write speeds over time.
App uninstaller — drag an app in and Sensei finds its leftover files across the system.
Performance cleaner — free up space by clearing caches, logs and other temporary junk.

Wait 24 hours for the baseline to settle

Give the app twenty-four hours before you act on any numbers. Freshly installed, Sensei builds its baseline — temperatures, fan speeds, battery trends. What looks like a spike on day one often settles into a flat line by Thursday.

Three things worth doing straight away:

• Pin the menu bar monitor. Open preferences and tick Show in menu bar. A tiny CPU, GPU and temperature readout lives in the corner of your screen. Click it anytime for a quick graph without opening the full dashboard.
• Run one pass of the performance cleaner — but untick Mail downloads and Xcode cache if you use either. The defaults are sensible, yet those two can wipe things you wanted to keep.
• Note your battery cycle count. Write it on a sticky note, or just remember the number. Check it again in a month. That delta tells you more than any single health percentage.

If you installed Sensei partly for fan control, resist the urge to build a custom curve on day one. Let the stock profile run for a week while you watch the temperature graphs. You might find the factory curve is more sensible than you thought — or you might spot a pattern (say, the fans lag during an afternoon render) that tells you exactly where to add a steeper ramp.

Live write-speed graph spots a dips on an old SSD

It is half past nine. You slot an old external SSD into the Mac — a drive full of video rushes from last spring. Sensei’s disk tab already shows the volume mounted, with a live write-speed graph that dips every few seconds. The drive is nearly full and probably needs TRIM.

You open the hardware section, find the SSD, and flip the TRIM switch. The graph steadies within a minute. While the disk chugs through its internal housekeeping, you flick to the dashboard: CPU is coasting at twelve per cent, RAM pressure green, GPU idle. Nothing is overheating, so you leave the fan on its automatic curve.

By ten o’clock you have copied the rushes off, edited a rough cut, and exported a ProRes master. The temperature graph shows a gentle hill — fifty-two degrees at the peak, then a slide back to forty. No thermal throttling kicked in. You open the performance cleaner, tick System logs and User caches, and reclaim four gigs in under twenty seconds.

Before lunch, a colleague messages about an app that refuses to quit properly. You drag its icon into Sensei’s uninstaller. It finds the obvious binary plus four orphaned preference files and a launch daemon hiding in /Library. Six clicks, gone.

How Sensei stacks up against similar tools

Sensei vs iStat Menus. iStat Menus is a system monitor first, with a famously detailed menu bar. Sensei bundles monitoring with cleaning and maintenance. If you only want to watch temperatures and network throughput, iStat Menus is the specialist. If you want one app that monitors the hardware and clears junk and uninstalls stubborn software, Sensei covers more ground. Its dashboard is less customisable but quicker to read at a glance.

Sensei vs CleanMyMac X. CleanMyMac leans heavily into cleaning, with a guided scan-and-fix flow that suits people who want a single button to press. Sensei puts monitoring on equal footing with cleanup tasks. CleanMyMac’s interface is more polished and chatty; Sensei’s is quieter, closer to a workshop tool. Both uninstall apps and both clear caches, but Sensei adds TRIM toggling and fan curves — things CleanMyMac simply does not touch.

Sensei vs Stats (open-source). Stats is a free menu-bar monitor — lightweight, no cleaning features, no fan control. Sensei covers the same monitoring ground and then layers on everything else. If you need a simple readout of CPU and RAM and nothing more, Stats does the job. Sensei earns its place when you also want to reclaim disk space, manage SSDs, or track battery degradation over months rather than minutes.

All three can live alongside Sensei without conflict, but once the menu bar monitor is set up the way you like it, you might find you open the other apps less often.

• macOS 14 or newer
• Intel or Apple Silicon Mac