Increased fan noise since updating to MacOs Monterey.

Macbook 2020 was just a piece of garbage that they just threw a bunch of old attachments and made it worse than there previous releases with problems constantly with bluetooth and there new chip that forces you to buy external drives made for it compared to previous macs where any external drive would work and are cheaper. They literally just made it more expensive and buggy as ****. Have constant problems with it.

I have had the exact same issue since the minute I upgraded. I am always restarting, closing stuff down, the latest "fix" of 12.2.1 and still not working properly or or maybe it's overworking! I just checked the activity monitor and bluetooth was taking 258% of cpu....so I shut the bluetooth off and the fans instantly spooled down and quit. Not sure what is up. I do need the bluetooth to work! At the same time I do not want to burn this thing down. Mid 2015 MBP 15".

My MacBook Pro 16 has historically been very performant and quiet, but since MacOS Montery, the CPU usage will rocket up to 100% and the fans will become very loud at random times on idle loads. Not sure what has happened.

System Report Dump

Model Name: MacBook Pro

 Model Identifier: MacBookPro16,1

 Processor Name: 8-Core Intel Core i9

 Processor Speed: 2.4 GHz

 Number of Processors: 1

 Total Number of Cores: 8

 L2 Cache (per Core): 256 KB

 L3 Cache: 16 MB

 Hyper-Threading Technology: Enabled

 Memory: 32 GB

 System Firmware Version: 1715.81.2.0.0 (iBridge: 19.16.10744.0.0,0)

 OS Loader Version: 540.80.2~11

 Serial Number (system): C02FF27XMD6R

 Hardware UUID: C8B70487-7B66-529D-A8AB-6C04B48B8D8A

 Provisioning UDID: C8B70487-7B66-529D-A8AB-6C04B48B8D8A

 Activation Lock Status: Disabled

I have exactly the same experience. I have intel based 2020 macbook pro and I updated 2 days ago and have noticed a significant drop in performance, battery life whilst there is almost "no" feature that should require this. Anyone experiencing this, why software updates can cause this ?

The fan and over heating issue is solved with the latest update version 12.1 (21C52).

I had this exact issue as described. Steps 1-3 of this (https://support.apple.com/en-us/HT201295) solved it for me

Just a point of reference - the reply was offered to the Owner of the Original Question.

One is welcome to offer some constructive solutions when they are found.

I am about to do the same for exactly the same reasons

Thank You, it helped solving my problem too.

Same problem my fan goes to 100% all the time from boot to shutdown, monterey is very very buggy I regret updating

Issue hasn't been resolved for me... I updated to 12.1 and reset PRAM/SMC and I still have my fan blasting after 5 minutes of use.

Sadly I have the same problem and upgrading to 12.1 didn't help it.

That didn't work for me. :(