Reading hardware information from command line with built-in tools.The above article and the script it contains was designed for Mac OS X 10.4.3. This article, get sensor information, shows how to use ioreg to extract the fan speed information with: ioreg -c IOHWSensor | grep -B3 -A11 '"type" = "fanspeed"' See Can I get the CPU temperature and fan speed from the command line in OS X? Pre-Mac OS X 10.5 Other tools and applications exist, including Temperature Monitor. This is a computationally expensive process, even when run for one second. So you can increase your minimum fan speed to make your Intel Mac run cooler. When I am watching movies or playing games I setup a multimedia profile that runs my fans to 6000 RPM. Find your CPU fan among the list based on what cable it connects to your motherboard and what port it connects to. Additionally, my Macbook Pro is quite a bit cooler to the touch. While Mac users can download smcFanControl software to monitor their mac fan. My Macbook Pro is running a lot cooler and now I have no worries about overheating. To do this, click the button in the top right corner of a fan control card. smcFanControl lets the user set the minimum speed of the build-in fans. SMC Fancontrol is a fantastic program and works as designed. Spindump requires administrator privileges and when run manually, spindump samples user and kernel stacks for every process in the system. smcFanControl controls the fans of every Intel Mac to make it run cooler. This article, OS X: Current CPU temperature on command line, talks about the project and how to extract the fan speed: smc -k TC0D -r | sed 's/.*bytes \(.*\))/\1/' |sed 's/\(*\)/0x\1/g' | perl -ne 'chomp ($low,$high) = split(/ /) print (((hex($low)*256)+hex($high))/4/64) print "C\n" ' The open source project Fan Control includes a command line tool that provides fan speed information. For those wondering, the minimum default fan speed is 1,000 rpm for the 15-inch MacBook Pro, 1,500rpm for its 13. ![]() You cannot set a minimum/maximum speed to a value below/above Apple’s defaults. The app ensures that whatever value you set is within acceptable tolerances. It appears no tool, installed by default on OS X, exposes this information through the terminal. smcFanControl manages your Mac’s fans responsibly to avoid damaging it. Since Mac OS X 10.5, you need to use a third party piece of software to access the fan speed information. See the smc manual page for more options. You can use smc to get fan speed information via Terminal.app: smc -f You mention in your comments having smcFanControl installed this open source project includes the command line tool smc.
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