Collie
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Collie is a small Mac menu bar app that herds your apps and local services. It checks they're not just running but actually responding, and rounds up any strays by restarting them.
It turns orange while it's fixing something and red when it needs you, and the menu tells you what's wrong. How it works
Unsigned for now – the first time, right-click the app and choose Open.
Collie 1.0 – macOS 26 or later, Apple silicon
Pricing
Start with a 3-week free trial, then subscribe:
More about buying – how licence keys work, and what happens when the trial ends.