앱별 에너지
무료
어떤 앱이 전력을 쓰고 있는지 와트 단위로 보여 주며, 측정값과 추정치를 구분해 표시합니다.
The problem
Your battery drains faster than it should, and Activity Monitor's Energy Impact is a relative score, not a unit. It does not tell you how many watts an app draws, or what the chip as a whole is using.
The Energy view shows watts: per app where macOS keeps a counter, and for the chip split into CPU, GPU, Neural Engine and memory where your Mac reports them. Where a number is an estimate, it says so, and an estimate never reaches a receipt.
How it works
- Read the counter. macOS keeps a running energy total for each process. Hedroom takes the difference over each scan window and adds up an app and its helpers, which gives watts.
- Mark estimates. If macOS gives no counter for an app, Hedroom shares the chip's CPU power by CPU time and shows it with "≈" and the word "estimate". An app macOS does not let Hedroom read shows no number, never 0.
- Read the chip. Chip power comes from a macOS interface Apple does not document, so Hedroom checks it works on your Mac and says so when it does not.
- Keep the battery separate. The "time left" figure uses the battery's own voltage and current, because chip power leaves out the display, the SSD and the radios.
- Use only measured values in receipts. Estimates are never stored. A receipt uses an app's own watts only when it has at least 3 measured readings before the action, and counts a change only from 0.3 W.
What you will see
On the CPU & Energy screen, the Energy tile shows battery percentage and the measured chip watts with their split. On battery it also shows what the whole Mac draws from the battery. Under "Top energy users", up to five apps are listed with watts: "1.4 W" when measured, or "≈ 1.4 W · estimate" when not. The list stays hidden until at least one app uses 0.05 W or more.
If macOS stops reporting chip power, for example after an update changes how it is reported, a card says "Energy readings paused". Memory, CPU, rules and storage keep working.
A worked example
Example, not real data
Two apps, two kinds of number
Say the top energy users list shows one app at "1.4 W" and another at "≈ 1.1 W · estimate". The first number is read from macOS's own counter for that app. The second is the chip's CPU power divided by CPU time, because macOS gave no counter for it. Idle power lands on whoever ran, so treat it as a guide.
You move the first app to the efficiency cores. Hedroom's receipt uses its measured watts and reports the change if it clears 0.3 W. For the second app, a receipt would fall back to another measure instead of building on an estimate.
Details and limits
하는 일
- macOS가 프로세스마다 보관하는 에너지 카운터에서 앱별 와트를 읽습니다.
- macOS가 앱의 카운터를 제공하지 않으면 "≈"와 "추정"을 붙여 추정치(칩의 CPU 전력을 CPU 시간으로 나눈 값)를 표시합니다.
- 에너지 타일에 칩 전력을 표시하며, Mac이 보고하는 경우 CPU, GPU, Neural Engine, 메모리로 나누어 보여 줍니다.
What it will not do
- 추정치를 측정값처럼 보여 주거나 추정치를 저장하는 일. 영수증에는 측정한 앱별 와트만 사용합니다.
- 칩의 와트를 배터리 소모로 취급하는 일. "남은 시간" 값에는 배터리 자체의 전압과 전류를 사용합니다.
Limits
- 모든 Mac이 모든 전력 채널을 보고하는 것은 아닙니다. Hedroom은 읽을 수 있는 것을 보여 주고 나머지는 생략합니다.
무료 또는 Pro
보는 것은 무료입니다.
Seeing where your power goes changes nothing. Moving an app to the efficiency cores is a fix, so that is Pro.
Questions people ask
Is this Activity Monitor's Energy Impact?
No. Hedroom shows watts, and never an Energy Impact score.
How much battery does reading energy use?
One read of the chip's energy counters took about 1 millisecond on the MacBook Pro it was checked on, and Hedroom reads at most once every 3.5 seconds. That is one Mac, not a promise for yours.
Why does "time left" not match the chip watts?
Chip power leaves out the display, the SSD and the radios, so pairing it with time left would overstate battery life. Time left uses the battery's own voltage and current.
Does it need a permission?
No admin password and no special permission. Per-app readings are available for processes your user account can read.