WHY My MacBook's cpu frequency gets very low when charging it?

baggu_27 wrote:

Hello, I have a 2018 15-inch MacBook Pro I have a habit I frequently use MacBook when plugged in. BUT! I always had a major problem where my MacBook slows down a lot when charging I checked the cpu frequency it got from 2.60 to 0.80 and it does overheat as well (I use apple's original MacBook charger)

so anybody had issue like me so please tell me cause I am really sick of this.

Never heard this issue before....

On an Intel Mac you can Try resetting the System Management Controller

Reset the SMC of your Mac - Apple Support

To trouble shoot further you can:

—A SafeBoot Use safe mode on your Mac - 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.

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. 

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

if no insight or resolve—

you can file a bug report /submit your Apple Feedback here: Product Feedback - Apple