MacOS Big Sur Lagging

Same! I'm so mad. I am virtually teaching and my MacBook is so slow about the dumb Big Sur that it's impossible to teach now. Apple needs to fix this soon!

Big same with Big Sur 11.3 update. Was using Catalina before and never had a problem. TouchBar has bad lag and is even unresponsive at times.

Macbook Pro 16" 2019
2,4 GHz 8-Core Intel Core i9
32 GB 2667 MHz DDR4
Intel UHD Graphics 630 1536 MB

Same here after upgrading from Catalina to Big Sur 11.3.
Streaming videos lagging, Youtube, Apple TV app, Vimeo unwatchable. And if I switch resolution from Default to max, all windows start lagging, Finder, menus, apps, scrolling and typing text. I mean WTF??
I always wait at least few months till they catch out all the bugs, but now it is almost next WWDC around the corner and I get unusable OS that converts my $4000 mac into a two decades old Acer??

iMac (Retina 5K, 27-inch, 2020)
3,8 GHz 8-Core Intel Core i7
96 GB 2400 MHz DDR4
AMD Radeon Pro 5700 8 GB

Same here. My battery drains overnight. Slow system startup with ui lagging. Safari can't play full HD video stream...

Rolled back to Catalina two months ago and all was fine till today.

But today i had got the same except ui lagging on Catalina.... (Recently i had Catalina upgrade)

Model Name: MacBook Pro(2018)
Model Identifier: MacBookPro15,1
Processor Name: 6-Core Intel Core i7 (2.2 GHz)
Memory: 16 GB (2400 MHz DDR4)
Chipset Model: Intel UHD Graphics 630, Radeon Pro 555X
Battery: Service Recommended (first saw it today)

same i have the 2019 mac desktop with plenty of storage and yet since the update its been incredibly slow

Hi all,
I wonder what could be the issue, which cannot be solved since half year. I have same symptoms since updating to BigSur one month ago. Put all my hope into latest update to 11.3.1, but still issues. With Catalina, I never had such issues, even with my old MacBook from 2011 during the 9 years I was using it, I didn't have such massive performance issues. What goes wrong here?

Symptoms:
When starting simple applications, like safari, it takes minutes to complete. During that time, watching the activity monitor doesn't show any issues with cpu usage. I activated display of seconds at my clock and clock keeps ticking, I can move mouse and click on things in other applications, but it won't execute. Watching top on the console doesn't show any trouble. Where is the time spent? Maybe somewhere deep in the kernel? Then after a while, which feels like ages, system is ok again and executes the mousclicks and keyboard entries... If anybody from apple kernel development team is looking at this, please do something about it, it really sucks!

  OS: Big Sur 11.3.1
Modell: Macmini8,1 (Mac Mini 2018)
  CPU Type: Quad-Core Intel Core i3
  RAM: 8 GB

Thanks
AndyPie

Same here.
Just reinstalled OS X Catalina (that's the version before Big Sur). Finally got my laptop back in life! Having Big Sur for more than half a year was really painful, playing a video was laggy, and the laptop was hitting high temperatures even with fan spinning on max. It was also significantly slower with all other programs.

Strongly suggest to everyone to get some time to do this:
https://discussions.apple.com/thread/252046511
https://apps.apple.com/us/app/macos-catalina/id1466841314?mt=12
https://support.apple.com/en-gb/HT201372

MacBook Pro (Retina, 13-inch, Early 2015)
2,7 GHz Dual-Core Intel Core i5
8 GB 1867 MHz DDR3
Intel Iris Graphics 6100 1536 MB

I have a MacBook Pro 2016 13'
8 GB 1867 MHz LPDDR3
Intel Iris Graphics 540 1536 MB

I'm having lag problems in App Store and Safari since day one of this update, and still it's almost a year of Big Sur and no fix at all.
I just can't understand why Catalina runs like flash and this one runs buggy... its a one year diference of update, not 5 or 4 years.

I'm going back to Catalina and wait for it to be fixed or just wait for the next major updated I guess.....

Wild funds

I wish I had read this topic earlier. Last week, I updated my MacBook to Big Sur. It is such a disappointment. All the apps are laggy and super slow, which deeply affects my work time. It took more than an hour to export a 2 mins clip in iMovie. It even stops responding when using Microsoft Office. I want my old macOS version back.

• > Conclusion: Do not update to Big Sur.

P/s: I hope Apple will launch an update to fix these problems or else I need to find a way to use the older macOS version.

I'm sharing an iMac Late 2014 (the oldest computer that is said to work with Big Sur)

It was very slow so we fully wiped the computer and installed a fresh copy of Big Sur, and it was still very slow, laggy etc.

We left the computer on doing nothing for 2 days and now it's fully fast as it was before - there are 2 days of background update processes that the mac doesn't tell you about...

I'm having the same issue.

MacBook Pro (Retina, 13-inch, Early 2015)
"2.7" GHz Dual-Core Intel Core i5
8 GB 1867 MHz DDR3
Intel Iris Graphics 6100 1536 MB

I am having the same issue, I would've thought that after 6 months it would be fixed?
I get random crashes, sometimes while I am away from the computer, everything goes black and it restarts with an error.
Apple "experts" are worthless, I mean I run the same stuff that I used to run on my 2017.
My iMac is brand new, bought about 2 weeks ago and it started the day I took it out of the box.
This week is doesn't go black, it randomly takes 5 minutes to open a simple file (talking less than 1mb) or go through finder to get a file.. meanwhile I can't even prompt Force Quit. Even just trying to open "About this Mac" and nothing happens.

iMac 5k Retina, 27in. 2020
8-Core Intel Core i7 3.8ghz
72GB 2133MHZ DDR4
Radeon Pro 5500 XT 8GB

Same issue

I've been having the same problem since "updating" to Big Sur. Sometimes resetting SMC and/or NVRAM helps temporarily, other times it does not help. So frustrating that Apple hasn't fixed this issue in more than 6 months. My Macbook Pro is essentially unusable most of the time.