nikhil.io

Very cool. More CLI than UTM. Another is Lima.

You can use System Settings -> Battery -> Battery Health -> Info Icon to toggle this “ML” approach where macOS (and the developers who know more than you about how to care for your Mac) will handle this for you but I’ve never gotten it to work as expected despite docking my laptop repeatedly, and for half the day, over a year.

You can buy it on Gumroad or here’s a download link.

Another is Swinsian which looks like iTunes of yore but doesn’t have dark mode (and, not that this means anything, appears to have no updates since 2018).

Both apps are paid. An Open-Source manager is the Strawberry Music Player

Here’s a Github Gist for a CLI option that uses diskutil.