Understand your battery. Keep your Mac awake.
A menu bar app that promises nothing macOS doesn’t allow. Free, no account, no tracking.
Requires macOS 26.4 or later
Free. Every feature.
No purchase, no subscription, no ads. It is the first product Atelieras has published.
No account, no server, no tracking.
Nothing leaves your Mac. The App Store privacy label reads “Data Not Collected”.
Sandboxed. Verifiable.
No helper tool, no root. Everything it switches shows up in pmset.
At a glance
Charge level, health, cycle count, power draw, temperature and thermal state, right in the menu bar. The percentage next to the icon can be turned off.
- 1Charge level as an arc gauge, with time remaining beneath it.
- 2Maximum capacity relative to the original design capacity.
- 3Charge cycles read from the battery controller.
- 4Current power draw, updated every few seconds.
- 5Battery temperature as reported by the system.
- 6Thermal state of the Mac: nominal, fair, serious or critical.
Stay awake
“Display Awake”, “Mac Awake”, or a mode of your own. Keep Awake runs from 30 minutes to unlimited. The power adapter can switch modes when you plug in or unplug.
⌥⌘P opens the popover from anywhere.
- 1The selected wake mode. “Standard” lets macOS sleep as usual.
- 2Keep Awake with a countdown, 30 minutes to unlimited.
- 3Rules by time, location, battery level or power adapter.
Verifiable on the system
Every wake mode is a regular power assertion. macOS lists it, and so does anyone who asks.
Two assertions, both named PowerMate.
Automatically right
Switch modes by time of day, by location, or by battery level. Rules run locally; nothing is scheduled outside your Mac.
- TimeWeekdays, 9 am – 6 pmDisplay Awake
- LocationAt the officeMac Awake
- BatteryBelow 20 %Standard
Location access is requested only when you create a location rule. Coordinates are stored in the Keychain and never synced.
See how your battery ages
Health and cycles for up to 365 days, a linear forecast, and an analysis of your charging habits: sessions, duration, time of day. Export everything as CSV.
Try the forecast
Enter your own values. The tool uses the same linear method as the app: loss so far, spread evenly over the months, extended forward.
Both values are in System Settings → Battery → Battery Health, or in PowerMate’s Overview tab.
- Loss per month
- 0.3 %
- Forecast in 12 months
- 90 %
- Cycles per month
- 12.1
- Reaches 80 % in about
- 3 years and 6 months
A straight line is a rough guide. Batteries age faster when hot or often fully charged, and slower with gentle use; the app refines its forecast from daily snapshots.
Remind, don’t intervene
A notification at a threshold you choose, and a warning when the battery runs low.
It is a reminder, not a limit: stopping the charge would need SMC access, which a sandboxed App Store app does not have. PowerMate tells you. You unplug.
Honestly limited
PowerMate runs in the App Sandbox and needs no helper tools or administrator rights. That sets a clear line, and the line is the product.
Can
Read the battery
Level, health, cycles, power draw, temperature via IOKit, read-only, no special permissions.
Prevent sleep
Display and system sleep via IOPMAssertion. Listed by pmset -g assertions.
Remind you to unplug
A notification at your threshold. The charge itself continues.
Show Low Power Mode
Read from the system and linked to System Settings, where you switch it.
Deliberately can’t
Stop charging at 80 %
That needs SMC access. Only apps outside the sandbox and outside the App Store have it.
Switch Low Power Mode
macOS exposes it read-only to apps. PowerMate shows it and takes you to the switch.
Set sleep timers in minutes
That is pmset with root privileges. PowerMate can only prevent sleep, never schedule it.
Run a privileged helper
No pmset, no SMJobBless, no root. Nothing runs outside the sandbox.
What it can’t do, it doesn’t claim.
Sandbox or not: what it changes
Every Mac App Store app runs in the App Sandbox. Tools that stop charging or set sleep timers need what the sandbox forbids, so they live outside the store. Both are legitimate choices; this table says what each one means.
| Feature | PowerMate (sandboxed) | Tools outside the sandbox |
|---|---|---|
| Read battery data | Yes | Yes |
| Wake modes, Keep Awake | Yes, verifiable with pmset | Usually yes |
| Charge reminder at a threshold | Yes | Varies |
| Stop charging at a threshold | No, needs SMC access | Possible |
| Sleep timers in minutes | No, needs pmset with root | Possible |
| Helper tool or admin rights | None | Often required |
| Available in the Mac App Store | Yes | No, sandbox is mandatory there |
| Price | Free | Varies |
Your data stays yours
Read the privacy policy- No server, no account, no analytics SDK. Nothing is transmitted to the developer or to anyone else.
- Location rules are evaluated on your Mac. Coordinates live in the Keychain and are excluded from sync.
- Settings sync uses your own iCloud key-value store between your Macs. It can be turned off.
- The App Store privacy label reads “Data Not Collected”.
Free. Every feature. No purchase.
Requires macOS 26.4 or later
Developed by Atelieras.