Diagnosis
What's actually happening with your fan, and which part of it you can change.
Mac mini M4 fan stuck at 1000 RPM
Why there's nothing to click in System Settings, and the one real way to raise the floor.
Mac fan won't ramp up, even near 100°C
Why that's Apple's curve working as designed, not a fault — and how to get ahead of it with your own rule.
Mac fan high-pitched whine
How to tell a fan resonating at one specific RPM apart from unrelated coil whine.
Use cases
How fan control fits into what you're actually doing with your Mac.
Alternatives
What's worth checking before you switch, and where FanFan Control differs.