Control Intel Mac fans to make them run cooler.
smcFanControl lets the user set the minimum speed of the build in fans. So you can increase your minimum fan speed to make your Intel Mac run cooler. However in order not to damage your machines smcFanControl doesn't let you set a minimum speed to a value below Apple's defaults.
Note: Now requires OS X 10.7 or later
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As one who uses constantly running air purifiers in my home/work office, I know that these type of fans run for years with no issues. They are designed to run 24-7-365 and never wear out for years. I know Apple uses the same quality type fans or even superior, so I never worry about replacing fans prematurely in my MacBook. Moreover, even if I needed to in two or three years, that's a fraction in cost of replacing my SSD or multi core processors due to heat, not to mention that cooler processors run infinitely better than overheated ones. All high graphic use 3D gamers know this, I'm told.
To the Developer, i'm sure some of us faithful users would be willing to pay for an update capable of working on the 2018+ Macs...