Macs Fan Control

Macs Fan Control is a free app from CrystalIdea Software Inc. for better control over Mac cooling fans, letting you set individual fans to a constant speed or control them in relation to a specific temperature sensor, from built-in Apple sensors to third-party hard drive and SSD SMART data. You can set minimum and maximum thresholds, display thermal sensor data, display a temperature and fan speed in the Mac menubar, and even use it with Windows running in Boot Camp.

Macs Fan Control 1.5.4 is a free download for macOS 10.12 and up with earlier versions available for Mac OS X 10.6 to OS X 10.11. A $14.95 “Pro” version brings custom fan presets, plus “priority customer support and confidence in future updates and improvements.” The latest release now works in Windows 10 also on modern computers that have the T2 security chip.

Turbo Boost Switcher

Turbo Boost Switcher is a Mac utility from from Rubén García Pérez (rugarciap.com) that lets you control Intel’s Turbo Boost mode to extend battery life, reduce CPU heating and otherwise tune the CPU for your particular needs. Other features include fan and temperature graphs, automatic enable/disable settings for individual apps, and the ability to change modes based on the presence of a battery charger, battery level, fan speed, and CPU load.
  Turbo Boost Switcher Pro 2.9.1 is priced at $9.95 for Mac OS X 10.6 and up (including Catalina. A free version is available for download with limited features.