Why? Your Mac, explained.

Your Mac, explained.

A one-time check turns trusted macOS signals into a plain-English answer.

Manual checks On-device No account

Why? Your Mac, explained.

Understand what your Mac is doing

Why? checks your Mac only when you ask. It doesn’t monitor continuously, and each check takes about five seconds.

Check Now Quit

The useful answer,
not another dashboard.

Why? brings supported macOS signals together and presents the strongest explanation first.

Open it from the menu bar, ask for a check, and get a conclusion in about five seconds. Nothing runs continuously in the background.

Find what is keeping your processor busy.

Why? looks for sustained activity across two observations, then identifies the strongest qualifying process or application.

Why? showing Xcode as the main source of sustained processor activity.

Connect battery use to active work.

While your Mac is on battery, Why? can explain a likely processor-related contributor without inventing drain rates or battery-life predictions.

Why? explaining that Xcode is likely contributing to increased battery use.

Know what is delaying automatic sleep.

Supported macOS power assertions reveal who is preventing automatic idle sleep and why—without claiming that closing the lid or manual sleep is blocked.

Why? showing a browser preventing automatic sleep while the Mac is idle.

See when memory pressure needs attention.

Why? uses macOS memory-pressure signals to explain a real constraint instead of treating low free memory as a problem by itself.

Why? explaining that the Mac is running low on memory.

Manual by design

Why? checks your Mac only when you ask.

About five seconds On-device No account macOS 13 or later Apple Silicon