Same on my MacBookPro Late 2013. Hope to get an update soon.
Same here. I decided to update from Mojave to the latest one which is BigSur on my mid 2014 13inch 8 gb ram 256 gb ssd 2.6 GHz. My macbook pro was running just fine on mojave i was hesitating because of the 32 bit and 64 bit part however I decided I will go for it to see what Apple has done to the newer Softwares. This is a Big disappointment Sur. This was not expected of apple to release an OS which is incapable. I understand my macbook is 8 years old but this Big'headache'Sur is lagging worst than windows. Actually windows 10 runs better on it. Be careful old macbook users, this is not for old machines. Everything feels so glitched out. Thank Fully I don't have anything on my macbook so I can downgrade to Mojave whenever I want and thats what I am going to do. Its a long process but better than a bag full of lagged up Laptop. I love Apple I hope they send me a new Macbook as an apology because that sort of Apology is Approved by me.
If you are by any chance using "Turbo Boost Switcher", this is what caused the lag for me.
To solve it I did this:
The animations were not lagging anymore for me, I was able to replicate this 2 times. You can even start "Turbo Boost Switcher" again after going through those steps. But I don't know what actually causes the lags to start, because sometimes they come back.
Same here with my 16-inch 2019 macbook pro (2.3 Gh 8core i9, 16GB mem, Intel UHD 630 1536MB). I had no problems with lag associated with typing, clicking or mouse movement when I used Catalina. But once I upgraded to Big Sur, the lag is horrible and breaks my flow when trying to do anything.
Glad to hear other people have this issue. 16-inch MBP i9. Tried to have the apple store diagnose. Reinstalled all firmware and ran all the tests they have but they could find nothing wrong. Also have an M1 machine and a 2018 MBP 15-inch, neither of which have the lag issue.
Hey same problem, same computer. If anyone else has this, upgrading to Monterey worked like a dream! No more lag beyond just having only 8 gbs!
I was having the same issue on my iMac (Intel, 2019) after upgrading to Monterey. Lagging apps, UI issues, etc. I read Sherman13's solution of turning off the screensaver, and immediately after I turned that off, EVERYTHING sped back up to normal! No issues, lags or delays anymore. Nice and snappy again.
Finder was unusably sluggish since I upgraded to Big Sur. It took over a minute to open a Finder window. ActivityMonitor showed the Finder never went below 100% CPU usage. I tried all the tips I found here and elsewhere on the web, to no avail. To see whether the problem was connected to my user account, I created a Guest user account, and logged in as Guest. The CPU usage went below 4% and stayed there. Logging back into my own account, I closed all my applications, one by one, to no avail. Then I closed all my Finder windows (almost all of which had already been open in Catalina), and watched the CPU usage go down as each window closed.
Same! I tried to push the update as much forward as I could but many programs needed it.. After it everything is lagging and slow, the vent keeps regularly turning on and making a noise like my Macbook Pro is going to explode + everything freezes at that time. Also, some of my shortcuts stopped working eg cmd+c / cmd +v don't work in Finder, spotlight search isn't working anymore for Google Drive (where basically all my files are located), Photoshop barely works.. at first I couldn't even save things, edit windows were blank + some other weird stuff I didn't solve, Indesign crashes while saving large files ...and the list goes on. All those strange errors needed hours to be solved but some things I never did (luckily I can still use my other computer where I didn't make an update to use the programs that don't work). Basically I need to hire myself an IT guy to solve all this! I guess the best way to solve it is just quit using Apple. It's very hard, because I've been a Mac user almost 20 years but post Steve Jobs Apple really doesn't leave any other choice... really sad to see this kind of downfall. As a first step I just changed my phone to android during the last months :(