System
On-device battery on a Mac
battery is implemented in the native Swift app, not as a web view in the notch. Battery can appear as a short HUD rather than a permanent live activity.
Last updated 2027-05-03
Why native matters
A real Mac utility can follow Spaces, displays, and system appearance. battery is part of that host.
What stays in-tree
First-party battery lives in the app. Third-party packages cannot load unsigned code.