Big Iron wrote:
I'm experiencing high CPU utilization playing YouTube on Safari on my 2020 iMac 5K - 100% CPU on all 20 logical cores.
On my 2021 M1 Max MacBook Pro the same workload seems to run fine just staying on just the ecores.
It's really gotten so I can't watch YouTube on the iMac since it eats up all the CPU resources.
Is anyone else experiencing this?
I'd occasionally experience high CPU utilization prior to Sequoia but I honestly think things have gotten much worse now.
-- Thanks, Verne
[Re-Titled by Moderator]
Have you tried an alternative browser and compared your results...this would be telling, no(?)
To trouble shoot further you can:
—A SafeBoot Start up your Mac in safe mode - Apple Support will sort many anomalies
Does a quick disk repair before it fully boots up, and certain system caches get cleared and rebuilt, third party system modifications and system accelerations are disabled temporarily.
Login and test. Reboot as normal and test. Caches get rebuilt automatically.
This test will tell you if third party interference; most extensions etc are not loaded in safe boot mode.
—Test issue in another user (or guest user) account Change Users & Groups settings on Mac - Apple Support
This will tell you if it a universal issue or isolated to your user/admin account.
***wireless keyboard with rechargeable batteries— connect the charging cable, this will make the wired keyboard successful Safe Boot your Mac.
unplug all non-essential peripherals when testing
Uninstall all third party apps that are Cleaners/Optimizers/VPN/Anti-Virus
all known to cause issues on the macOS
