Firefox has used most of your CPU for 8 minutes.
Overview opens with one sentence about your Mac: what is going on, who is responsible, and what you can do about it. The rules are fixed and run on your Mac. There is no AI model and no network call behind it.
Firefox has used most of your CPU for 8 minutes.
51% of your Mac's CPU, about 3 times its usual. The CPU is at 69°C.
Firefox has used most of your CPU for 8 minutes.
51% of your Mac's CPU, about 3 times its usual. The CPU is at 69°C.
The Inspector, Settings and the full tables need a wider window.
Simulated data, running in your browser.
It looks for what makes a Mac feel wrong.
An app holding the CPU for minutes. Memory pressure. Swap that keeps growing. Heat, and the Mac slowing itself down to cope. A battery falling faster than it should. A nearly full disk. An app writing for minutes on end. A reading far above what is usual for this hour of the week.
It waits before it says anything.
A rule has to hold before it shows, usually for a few minutes, and it clears later than it triggers. A two-second spike does not earn a sentence, and the sentence does not flicker when a reading sits near a limit.
It names one app and gives the evidence.
Under the sentence is a line of numbers: the share of your CPU, how that compares with the app's usual, what the temperature is doing. Then at most two actions, such as Inspect or Quit. Quitting asks first.
Agents get the quiet line.
The headline is about the Mac. A coding agent that needs you, or an idle dev server, goes on a smaller line beginning "Also:", so work never shouts over a real problem.
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