Mac OS over heating

Your M4 MacBook Air can get noticeably warm during demanding tasks such as 3D editing and gaming. 

Because the MacBook Air is fan-less, heat is dissipated through the chassis. 

What is worth checking here is that you are also seeing more warmth than before during light use, such as having only two Safari tabs open. 

Apple recommends using Activity Monitor when a Mac laptop becomes warm without doing intensive work. Apple: Keep your Mac laptop within acceptable operating temperatures

Start by opening Activity Monitor >> View ALL Processes >> CPU and see whether any process is using a significant amount of CPU. 

Then choose Window >> GPU History to see whether the GPU is active. 

It's useful to check both when the Mac is sitting idle and when it gets warmer during 3D work or gaming. Apple: Activity Monitor User Guide

If kernel_task is using a lot of CPU, do not  assume that it is causing the heat. 

Apple explains that kernel_task can increase its activity to help manage CPU temperature. Apple: If kernel_task is using a large percentage of your Mac CPU

Next, restart the Mac normally and test it again with the same light workload. 

Keep it on a hard, stable surface with good ventilation, and note whether it is connected to power or has an external display, hub, drive, or other accessory connected. 

Apple recommends an ambient temperature of 10°C to 35°C. Apple: Keep your Mac laptop within acceptable operating temperatures

If the behaviour continues, try Safe Mode and see whether the Mac behaves differently. 

Apple notes that Safe Mode can help determine whether software that loads during startup is contributing to a problem.

If the Mac continues to become unusually warm during light use, run Apple Diagnostics. 

Shut it down, hold the power button until the startup options appear, then press and hold Command-D. If Diagnostics gives you a reference code, keep it for Apple Support or service. Apple: Use Apple Diagnostics to test your Mac

Apple's release information describes macOS 27.0.1 as providing bug fixes but does not establish that the update causes increased operating temperature. 

The fact that you noticed the change after updating is useful information to report, but it does not by itself show that 27.0.1 caused it. 

If the issue continues after these checks, Apple recommends contacting Apple or an Apple Authorized Service Provider.

Have the computer evaluated by the Professionals who have the Special Hardware Software and Expertise to diagnose the issue and offer possible solutions

Make an Appointment at the Apple Genius Bar or call 1 800 MyApple and have them evaluate the computer

Other location Call Centres 

 Contact Apple for support and service

To avoid a game of 20 questions   

Download the Application Etrecheck  ( External Link ) directly from the Developer.

This is a Diagnostic Tool that makes no changes to the computer.

It makes a coherent and readable inventory of both the Hardware and Software used on the computer 

The application is free or paid for added features. 

The Report will Not Reveal Any Personal Information. 

Post back the Full Report - Share Report >> Copy , then  paste  >>>> using the Additional Text Icon  <<<<

Heavy processing loads generate heat, that’s normal. You can see what is using significant processor resources by opening Activity Monitor, and sorting the CPU tab by % CPU. Known compute-intensive tasks like gaming, video transcoding, etc., will cause your Mac’s processors to heat up. Your Mac will manage its thermal state. On MacBook Pro models, the fan(s) will spin up to cool the Mac. MacBook Air models with Apple Silicon lack fans, but if needed macOS will throttle back the processors to cool them down. 

You should always ensure that the ventilation openings are not blocked (even for the MacBook Air, since that relies on convection cooling). Use your Mac on a hard surface, not on a pillow or blanket. The bottom of the case may get warm, there’s a reason Apple calls these ‘notebook computers’ and not laptops. 

Some programs are inappropriately processor-intensive, for example Google Chrome is a known resource hog on Macs (in part because it installs several extensions that run in the background to support Google’s information-selling revenue model, and those run even if you don’t launch Chrome; see https://chromeisbad.com). Similarly, ‘helpers’ like the misnamed CleanMyMac (aka BrickMyMac) and antivirus software are not only not needed but can be detrimental to your Mac. Roblox is going to tax a MacBook Air.

Spotlight re-indexes your Mac after a macOS update, and this process can take some time and use system resources.

About Spotlight indexing and search results on Apple devices - Apple Support

See this document about the operating temperature of Mac notebooks and how to keep your Mac notebook within acceptable operating temperatures - Keep your Mac laptop within acceptable operating temperatures - Apple Support

Others can provide better advice but I suspect that all the CPU intensive things you are doing are too much for a macBook Air.

yeah bro I know but I saw the gpu history its normal no over usage and when I play game like Roblox and gpu hits it almost limit and I am regular user of my Mac and I constantly check my Mac temp while I game but not much while I edit or something and last night it auto update I didn't knew it but when in morning I used it immediately noticed high temp not little high its almost untouchable on some moment then I check why it over heating I checked all thing in activity monitor and found nothing suspicious but when I saw the msg your Mac is updated to 27.0.1 I know and I watch some yt videos alll people saying its worst update and i face the shuttering issue in edit and gaming tbh its the macOS