Overheating MacBook Pro after Big Sur instal

Sorted mine.

Deleted the EFI Folder in Applications as I use to manage Fiery based printers, but if course not everyone does, so …

I also spent ages using the ETRE Check App to analyse my System and remove the decade(s) of past Apps, Daemons, Launch, Preferences, ktexts … it was a laborious pain but this manual system clean flushed out old, bad? software …

I've had this problem ever since installing Big Sur on my Mac Mini (Late 2014), 3 GHz Dual-Core Intel Core i7, 16 GB 1600 MHz DDR3 Memory, with 1TB Solid State Internal Hard Drive. Currently at Big Sur 11.4, and problem continued, computer becoming very hot during use and while asleep. In addition, simple warm restarts not requested immediately after restarting often require five minutes or so and indicate computer was restarted because of a problem. Also, Finder 11.4 frequently crashes and sometimes restarts on its own.

Recently I discovered that deselecting the Ken Burns screensaver appears to cure most of these problems. I switched to the Word of the Day screensaver, but others also appear to help. My computer is definitely running cooler, also much cooler when in sleep mode with the screen saver active, and a lot fewer (almost none) Finder crashes or unsolicited restarts during use.

I have the exact same problem and am so exasperated. Despite the cpu % being under 20% and having the Big Sur update reinstalled at a Genius Bar, my computer continues to get hot with the loud fan on constantly even when just browsing the internet. It is especially frustrating because I never had this issue before the last OS update to Big Sur. I am upset with Apple and reconsidering their products entirely.

I had the same problem after I installed Big Sur on my 2014 all-solid-state Mac Mini. Most of the time the computer became almost too hot to touch. Updating to Big Sur version 11.4 actually seemed to make it worse. I eventually found that inactivating the new Ken Burns screen saver cured the overheating problem. (I'm now running the Word of the Day screen saver.)

Big Sur 11.4 has other problems: It occasionally restarts for no apparent reason, and I sometimes lose unsaved changes in Photoshop or Microsoft Word documents. Warm restarts are often very slow – five minutes or more – whereas restarts if I turn off power and restart the computer, or do a warm restart soon after a cold one take less than a minute, and every time the computer is restarted, even by my choice, it tells me the restart was due to a problem. Zapping the parameter ram doesn't cure any of this. It's all very irritating. I'm hoping Apple gets a handle on these issues and provides a better update version 11.5. Hard to understand why a company with such good products would introduce such a bug-laden upgrade to its operating system after all these years. Overconfident programmers and insufficient testing before releasing software is a well-known problem; could management changes that come with growth have caused Apple to lose understanding of that?

In addition to inactivating the "Ken Burns" screensaver, which pretty much cured the overheating problem, I recently discovered that unmounting all my external drives (or Command-E to eject each of them) after restart eliminates most of the other problems I have been experiencing with Big Sur 11.5.1 (i.e., Finder freezes, frequent unsolicited restarts for "problem", and long 5-minute+ restart times). When I need to access files on any of the external drives, I summon up the Disk Utility and reload that drive just long enough to do the work, then unmount it again.

I'll be interested to see if Apple's promised upgrade to the next OS generation eliminates these problems or if perhaps they are totally oblivious to all the wasted time and anger these issues are generating among Mac users. Or perhaps they could just provide users who choose to do so an easy path for downgrading to Catalina. That OS had all the bells and whistles I ever needed without the problems.

I have the same quastion as above : After instaling new macOS on my MacBook Pro it continuously heats up to

75C while doing nothing. I resterted my mac couple times with no effect,

and i checked if there is no any app running in background. Is anyone

got same problem after that update?

Are you using the "Ken Burns" screensaver? If so, go to System Preferences (under Apple logo menu), "Desktop & Screen Saver", and switch to "Word of the Day" screensaver. That made a big difference in heating for my Mac. It didn't seem to matter if the Screen Saver was actually being displayed. The overheating occurred even when using the Mac for other tasks.

MY MacBook Pro (15-inch, 2018), is doing the same. right after install Big Sur, the fan is always working hard even doing nothing. can someone help? regards

If you have a backup , restore to Catalina and then follow this way

https://support.apple.com/en-us/HT208891

Same issue with MBP13 2020 (A2251). Also GUI is no more smooth, especially when it comes to working with safari

I have no problem with my MBP16 you can install program "stats" (free) to monitor what is happening.

it may be my credit card that will heat up, to replace obsolete programs. It is preferable to install both OS 11 and 10 until all programs are up to date

I’ve installed Big Sur and after a couple of days it is fine. No more overheating. Right back to normal so it seems.

The same with me. No change even after reinstalling.

I have a MacBook Air (2018) and its having the same problems. My battery life has also decreased badly.