Short answer
macOS may warn you when battery is low, but it does not give most users a dedicated setting for a custom shutdown countdown.
BatteryCountdown creates that warning by showing the estimated time left before low battery shutdown directly in the menu bar.
What to do
- Install BatteryCountdown from the Mac App Store.
- Choose when the low battery countdown should start, from 1% to 20%.
- Decide whether the menu bar item should always be visible or appear only when useful.
- Use Charger Run Mode if you want a louder, more obvious warning when time is almost out.
Why this matters
Shutdown warnings are most valuable when they happen early enough for you to save work and reach a charger.
A live countdown makes the decision concrete: keep working, save now, or plug in immediately.
Useful BatteryCountdown settings
- Menu bar countdown for low battery time.
- Custom trigger percentage between 1% and 20%.
- Optional battery percentage in the menu bar.
- Charging estimate in the dropdown when your Mac is plugged in.
Quick answers
Does macOS have a shutdown warning?
macOS has built-in battery behavior, but it does not provide a simple custom shutdown countdown setting.
Can BatteryCountdown warn before shutdown?
Yes. It estimates low battery time left and shows it where you can see it.
Is Charger Run Mode required?
No. It is optional for moments where a quiet menu bar warning is not enough.