Upload the file to PasteBin or some equivalent place and we can take a look to see what’s causing the CPU usage spikes. After waiting for 10 seconds to collect a sample and another minute or two to symbolicate and format, you’ll get a file in /tmp/spindump.txt that contains a stackshot of every process. (In particular, do NOT have Activity Monitor running when you do this.): sudo spindump -reveal -noProcessingWhileSampling In Terminal, run the following, making sure you’re only running it during the window of time that you experience the system slowdown. Do the minimum required in order to reproduce the problem. Reboot your machine and don’t open any apps except for Terminal. Run the following command to enable kernel symbolication: sudo nvram boot-args="keepsyms=1" (this may require you to disable SIP first). Above is typical when the Notifications view is displayed, and below when Latest Tweets is, with the Twitter app using over 100 CPU, and WindowServer at nearly 40. These are easily seen in the CPU view of Activity Monitor. 
Otherwise, do it when the problem occurs. Excellent experience in Windows Server 2003/2008 and Active Directory (AD) Excellent experience in On-site support for Desktop, Laptop, mobile Phones, Printers and all IT related equipment. Switch to its Notifications view, and the app used little CPU, and WindowServer was far happier too.
We can try to confirm or refute this hypothesis if you’d like.ĭoes this occur if you’re running in Safe Mode? ( Shift during boot) If so, do the following in Safe Mode. It’s almost certain that you’re experiencing one of these bugs, and so you’re unlikely to be able to do much about it yourself. Big Sur has many known issues related to UI performance.
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