A native macOS menu bar app for real-time power monitoring on Apple Silicon MacBooks.
⚠️ MacBook only — PowerTop requires a built-in battery. Mac mini, Mac Studio, and Mac Pro are not supported.
- Real-time Power Flow Diagram — Visualize how power flows between AC adapter, battery, and system
- Instant Power Metrics — System power consumption, AC adapter output, battery charge/discharge rate
- Battery Health — Health percentage, cycle count, design capacity, temperature
- Detailed Parameters — Deep dive into battery cell data, charging details, lifetime statistics
- Power Source Notifications — Instant UI refresh when AC is plugged/unplugged
- Bilingual Support — English & Chinese (Simplified), follows system language
- Launch at Login — Option to start automatically on login
- Native macOS Experience — Built with SwiftUI, menu bar app with no dock icon
Menu bar power overview · Detailed battery and power parameters
- macOS 14.0 (Sonoma) or later
- Apple Silicon MacBook (battery required — Mac mini / Mac Studio / Mac Pro not supported)
Download PowerTop.dmg from the Releases page.
- Open
PowerTop.dmgand drag PowerTop to the Applications folder. - In Finder, open Applications and launch PowerTop once. When macOS reports that it cannot verify the app, close the warning.
- Open System Settings → Privacy & Security and scroll down to Security.
- Next to the message that PowerTop was blocked to protect your Mac, click Open Anyway.
- Authenticate with Touch ID or your password, then confirm Open. Future launches work normally.
PowerTop is ad-hoc signed but cannot be notarized because the project does not
have an Apple Developer account, so this one-time Gatekeeper approval is
expected. In the uncommon case that Open Anyway still does not work, run
this once after moving the app to /Applications:
xattr -cr /Applications/PowerTop.appgit clone https://github.com/scavin/PowerTop.git
cd PowerTop
bash build.sh
open build/PowerTop.appPowerTop reads power data from macOS IOKit's AppleSmartBattery service, specifically the PowerTelemetryData dictionary which provides:
| IOKit Property | Description |
|---|---|
SystemLoad |
Total system power consumption |
SystemPowerIn |
DC power from AC adapter |
BatteryPower |
Battery charge/discharge power |
Amperage × Voltage |
Actual battery charge rate (more reliable than BatteryPower) |
- On AC charging: System power =
SystemPowerIn- charge rate (AC input minus what goes to battery) - On battery: System power =
BatteryPower(discharge rate = system consumption) - Charge rate: Calculated from
abs(Amperage) × Voltage / 1,000,000for accuracy
PowerTop supports English and Simplified Chinese, automatically following your system language. You can also override the language in System Settings → General → Language & Region → Applications.
MIT License. See LICENSE for details.
一个原生 macOS 菜单栏应用，用于 Apple Silicon MacBook 的实时功耗监控。
⚠️ 仅支持 MacBook — PowerTop 需要内置电池。Mac mini、Mac Studio、Mac Pro 不受支持。
- 实时功率流向图 — 可视化 AC 适配器、电池和系统之间的功率流向
- 瞬时功率指标 — 系统功耗、AC 适配器输出、电池充放电功率
- 电池健康 — 健康度百分比、循环次数、设计容量、温度
- 详细参数 — 电芯数据、充电详情、生命周期统计
- 电源变更通知 — 插拔电源即时刷新界面
- 双语支持 — 中文和英文，跟随系统语言
- 开机启动 — 可选登录时自动启动
- 原生 macOS 体验 — SwiftUI 构建，菜单栏应用，无 Dock 图标
从 Releases 页面 下载 PowerTop.dmg。
- 打开
PowerTop.dmg，将 PowerTop 拖入 Applications（应用程序）。 - 在 Finder 中打开“应用程序”，双击 PowerTop 启动一次。看到 macOS 无法验证该 App 的提示后，关闭提示。
- 打开系统设置 → 隐私与安全性，向下滚动到“安全性”。
- 找到“已阻止‘PowerTop’以保护 Mac”，点击仍要打开。
- 使用 Touch ID 或登录密码验证，然后确认打开。以后可以正常双击启动。
PowerTop 已进行 ad-hoc 签名，但因为项目没有 Apple Developer 账号而无法进行
Apple 公证，所以上述 Gatekeeper 放行操作首次启动时属于预期行为。极少数情况下
点击仍要打开后依然失败，请在应用已移入 /Applications 后执行一次：
xattr -cr /Applications/PowerTop.appgit clone https://github.com/scavin/PowerTop.git
cd PowerTop
bash build.sh
open build/PowerTop.app- AC 充电时：系统功耗 =
SystemPowerIn- 充电功率（AC 输入减去向电池供电的部分） - 电池供电时：系统功耗 =
BatteryPower（放电功率 = 系统消耗） - 充电功率：使用
abs(Amperage) × Voltage / 1,000,000计算，比 BatteryPower 更准确