Why my mac slowed down after upgrading to big sur

You can try uninstalling it. You have to look for the instructions on their website.

If the problem persists, you may have to do a clean install.

Try uninstalling cmm, then run Etrecheck again to make sure it is totally gone, and see how your system performs.

Never installing anything that claims to "clean", "speed up" or "optimize" your mac. They're scams and can adversely affect your mac. And cmm is among the worst.

Hello,

I followed your raised question and here are some fixes for your Mac but first of all I would I have to tell you to not downgrade to Catalina because Catalina's support is ended and apple is fully concentrated on Mac Big Sur, to keep in touch the apple's movement and latest features, I highly suggest you stay with Mac Big Sur.

Here are some fixes that worked with my 2017 iMac which came with Mac Catalina when I first got it, now I have Big Sur and it's as smooth as butter.

• Enable reduce motion (This will help reduce or perhaps fully stop your map from lagging. If you still face slowing/lagging/glitching issues, you can also reduce transparency which will help for sure but won't look as good).

• Make sure to get CleanMyMac and run all of its free programs (You can also get paid version if you want).

https://cleanmymac.com/

• If you just recently updated to macOS Big Sur and you feel the Mac is slower than usual, the best course of action is to keep the Mac awake, plugged in (if it’s a laptop), and let it sit for a while (perhaps overnight or for a nights) – basically, hurry up and wait. I know that sounds like weird advice, but here’s the logic behind it: after a major macOS system software update, the Mac performs various maintenance routines behind the scenes, it reindexes the drive for Spotlight and Siri and apps like Photos may reindex too. So basically, let the Mac sit turned on overnight, perhaps for a few nights in a row, and allow those indexing and optimization processes to complete. When they’re finished, the performance of the Mac should be significantly better, if not entirely back to normal. This is often the number one reasons Mac users think a new

the operating system is slower than a prior version, so don’t disregard this

simple advice!

Taking these steps has helped me significantly to reduce total lag and other slowing issues. In-fact, my iMac now runs better with Mac Big Sur compared to Catalina.

Chrome is a huge resource hog, but still: there may be many causes for slowdown, and we need to know more in order to help.

Please run Etrecheck and post its full report here. Use the "additional text" button and paste the report into the text box.

You have fallen prey to the creepy "cleanmymac"...

User Login Items:

[Not Loaded] CleanMyMac-MAS Menu (App Store - installed 2021-01-25)

Modern Login Item

/Applications/CleanMyMac-MAS.app/Contents/Library/LoginItems/CleanMyMac-MAS Menu.app

[Loaded] S8EX82NJP6.com.macpaw.CleanMyMac-mas.HealthMonitor (App Store - installed 2021-01-25)

Modern Login Item

/Applications/CleanMyMac-MAS.app/Contents/Library/LoginItems/CleanMyMac-MAS Menu.app/Contents/Library/LoginItems/S8EX82NJP6.com.macpaw.CleanMyMac-mas.HealthMonitor.app

I forgot to mention, don't use chrome if you are using it, it consumes and sucks your mac's power and flow. Please use Mozilla Firefox instead, it runs smoother and faster. It will not play a key part in slowing down your Mac as Chrome does.

I can't say for sure, but this thing is like cancer... remove it first, then we can look for other problems.

cleanmymac is still there, or parts of it at least:

Unsigned Files:

Running app: S8EX82NJP6.com.macpaw.CleanMyMac-mas.HealthMonitor

I cannot see any mention of it. Let's hope it did not have the chance to damage your system.

NOOOOOO!!!!!

Cleanmymac is complete garbage. Never let this creepy thing anywhere near your mac if you want it to remain sane and functional.