Intermittent high fan RPM on Mac mini M4Pro

Sounds like maybe a brief power loss, that is not completely turning off the Mac mini.

Check your power cord connections on both ends to make sure that it is fulling inserted and tight.

Uninstall iStat and get a second opinion from another monitoring utility.

For example: MacFanControl from > https://crystalidea.com/macs-fan-control

If those do not help or fix the problem..?

Contact Apple > Contact - How to Contact Us - Apple

SHTsai wrote:

I did check the activity for CPU, Disk, and Network using Activity Monitor, but I saw no spiking. I think it may be malfunctioning is that the fan always dropped to 0 RPM before it goes to >4000 RPM even there is no spiking. And since this is a brand new device and I haven't installed or using other Apps, I was also expecting there is no spiking for all those components.

Yea' sure sounds like something is malfunctioning or not working right.

Don't wait, you only have 14 days to return it for a full refund.

see > Apple - Legal - Sales Policies - U.S. Retail Sales

SHTsai wrote:

Thank you for the suggestions. I will return it tomorrow and buy a new one to see if the issue is still existing

You're welcome. Yes that is the best corse to take from this point.

Just make sure that you deauthorize and remove your personal data before returning the Mac mini.

see > What to do before you sell, give away, trade in, or recycle your Mac - Apple Support

Check you Activity Monitor for spiking CPU, Disk and Network Activity.

Keep in mind that macOS has a lot of background work to do after a setup and migration, which could easily be causing the Fan to occasionally ramp up and down.

If the Fan doesn't settle down after that initial setup activity has passed..? Then recheck you Activity Monitor.

My Mini M4 pro always shows ~1000RPM unless under very heavy loads. It is very consistent. I use TG pro to show my RPM and temps. I can manually increase the fan speeds to ~5000 RPM but not really required.

Great, in that case I would uninstall all 3rd party monitoring apps - unreliable, unnecessary and can’t be used for problem reporting. All they do is sow doubt and little else. If it bothers you and you’re within the return window, return. Good luck!

Great, thanks for updating. If I were you, I would not install any 3rd party apps for monitoring temperature, speed, statistics etc. If the Mac is noisy, that’s sufficient in itself to report it to Apple and have them fix.

All the best!

Try these settings exactly as shown, might fix: