Why is my Mac battery draining so fast?

Background apps, browser tabs, and GPU-heavy processes like video calls or creative tools often drain your battery without you noticing. Activity Monitor shows an unhelpful "Energy Impact" number with no units. PowerVigil shows real watts per app so you can identify the actual culprit.

What app is draining my Mac battery?

PowerVigil ranks every running app by real energy consumption measured in watts via Apple's IOReport framework. It also learns each app's normal baseline and alerts you when something spikes to 3x its usual power draw.

Is PowerVigil an iStat Menus alternative?

Yes. PowerVigil offers features iStat Menus doesn't have: actionable battery tips, anomaly detection, real watts measurement, and usage intelligence with health prediction. It's also lighter (776 KB vs 30+ MB) and costs less.

Does it work on Intel Macs?

PowerVigil is built for Apple Silicon (M1/M2/M3/M4). Core features like real watts measurement depend on IOReport APIs only available on Apple Silicon. Intel Macs are not officially supported.

Is it a subscription?

No. PowerVigil Pro is a one-time purchase with all future updates included. The Founding Edition at €5.99 is limited to the first 500 licenses, after which the price goes to €9.99. There is no subscription, ever.

Guides

How to Reduce Your Mac Power Consumption

March 23, 2026

Apple Silicon Macs deliver excellent battery life, but M-series chips still have limits. If you need a charger before the workday ends, you need to examine your energy usage. Reducing power consumption extends your daily battery life and protects the long-term health of the device. A few strategic adjustments can add hours to your workflow on any machine, from an M1 MacBook Air to a fully loaded M4 Max MacBook Pro. These practical, data-driven steps will keep your Mac running longer and cooler.

Why “Energy Impact” Is Not Enough

Most Mac users open the built-in Activity Monitor to check battery drain. The problem is that

Frequently Asked Questions

What uses the most power on a Mac?

Browsers (especially Chrome), creative apps (Figma, Photoshop), video conferencing (Zoom, Teams), and GPU-intensive tasks are the biggest power consumers.

Does dark mode save battery on Mac?

On MacBooks with LCD displays, dark mode has minimal battery impact. The backlight uses the same power regardless. It helps more on OLED displays.

How many watts should my Mac use while idle?

An Apple Silicon MacBook should draw 2-5W at idle. If it consistently exceeds 8W with no active work, something is running in the background.

Ready to take control of your Mac battery?

Download PowerVigil Free