Monterey poor performance?
Since I updated my iMac to Monterey from Big Sur (early December), I had nothing but a very poor performance overall: slow startup, very high cpu usage from several apps (completely random), everything lags (typing, scrolling), video reproduction is like stop motion, subtle freezes, sound with a sudden noise in the background, etc.
After 10 minutes or so, it stabilizes but each time I start an app everything becomes laggy and slow again.
Every action I make in this computer it’s not fluid at all. Nearly impossible to use.
I already reinstall OS, clean install, disk repair, reseted nvram and SMC, downgraded to Big Sur again (still the same problem, not expecting this).
Even with a new OS, nothing installed, the symptoms are already there.
I’m out of ideas….
Thanks for your time.
(Find attached print screen from System Activity)