Big Sur 11.5.1 update, major lag

Hey Mykael!

So would you say the lag is more with web based functions? Like video rendering/buffering, or websites not loading fast? Or are applications pausing to launch, freezing, etc.?

If this happened after upgrading, can you test in a new user account and/or safe mode? Otherwise I may have more suggestions if the lag is more internet based, cheers.

https://support.apple.com/guide/mac-help/start-up-your-mac-in-safe-mode-mh21245/mac

Download and run Etrecheck. Etrecheck is a diagnostic tool that was developed by one of the most respected users here in the ASC and recommended by Apple Support  to provide a snapshot of the system and help identify the more obvious culprits that can adversely affect a Mac's performance.

IMPORTANT:

Before running Etrecheck assign Full Disk Access to Etrecheck in the Etrecheck's Privacy preference pane so that it can get additional information from the Console and log files for the report:

Also click and read the About info to further permit full disk access.

Copy the report

and use the Additional Text button to include the report in your reply.

Then we can examine the report and see if we can determine what might be causing the problem.

User wrote " my AI design software ". Even after a Fresh Install >> was migration assist used on the First Boot-up after the reinstallation ??

If Yes, if the backup was done from a previous problematic system and migrate assist was use to setup again - it will have re-introduced the same problematic issue into the new fresh installation.

Your AI Design Software have you verified with the Developer if the version being used on this machine is in fact compatible with Big Sur. Just because it may have worked on a previous version of macOS does not automatically translates to work on Big Sur.

So are you saying this specific computer is Owned by a Company or Organization. It, computer may be Enrolled in a Mobile Digital Management Service - that would mean only they will decided was software can be installed on this computer.

If above is true - contact the people managing this computer to sort out the issue as there is zero we can do to assist.

Very little information shared beyond " major lag ".

Is this a New Issue - if so what changes have occurred ??

Is this an Old Issue - if so what actions have been taken to resolve the issue ??

Are you experiencing the widespread caps lock / volume control / app switching freeze that appears a few hours after rebooting? Or something different?

Sounds good! Having enough RAM to support the processes you’re running, can’t go wrong with that! Glad you got it working again!