AntiRSI is a handy little macOS app that encourages shorter and longer breaks while at the computer to avoid muscle strain and tension. I first downloaded it over a decade ago and have always copied it when migrating to new laptops. With the latest migration to a computer running Sonoma on an M2 processor, it stopped working.
It appears that the original developer no longer maintains it, but I found a more recent fork on GitHub. I checked out and compiled it, and it instantly works. Nice!