narugit/smctemp

CLI tool to print CPU and GPU temperature of macOS

smctemp

Print CPU and GPU temperatures on macOS.

It works on following macs.

• arm64 (M3 mac)
• arm64 (M2 mac)
• arm64 (M1 mac)
• x86_64

Acknowledgements

I took the code from hholtmann/smcFanControl/smc-command and modified it to specialize in temperature acquisition. Some of the sensor values were obtained from the exelban/stats project.

How to Use

$ git clone https://github.com/narugit/smctemp
$ cd smctemp
$ sudo make install
$ smctemp -c

Usage

$ smctemp -h
Check Temperature by using Apple System Management Control (Smc) tool 0.5.0
Usage:
./smctemp [options]
    -c         : list CPU temperatures (Celsius)
    -g         : list GPU temperatures (Celsius)
    -h         : help
    -i         : set interval in milliseconds (e.g. -i25, valid range is 20-1000, default: 1000)
    -l         : list all keys and values
    -f         : fail-soft mode. Shows last valid value if current sensor read fails.
    -v         : version
    -n         : tries to query the temperature sensors for n times (e.g. -n3) until a valid value is returned

$ smctemp -c
64.2

$ smctemp -g
36.2

Note for M2 Mac Users

On M2 Macs, sensor values may be unstable as described in the following issue:

• #14
• #32

For M2 Macs, using the -n, -i, and -f options can help obtain more stable sensor values. Try tuning these options to get better results.

The recommended settings are -i25 -n180 -f (See also https://github.com/narugit/smctemp/pull/34/files#r1721025001)