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I am using mac book pro 16 inch, after upgrading to latest OS (Catalina 10.15.6), i have started facing this issue. Whenever i am connecting my mac book pro with extended monitor CPU consumptions started increasing exponentially from 10-15% to 75-85%.
Mac Pro
Welcome anoopsharma160,
Thanks for using the Apple Support Communities! We understand that when plugging in your computer to an external monitor the CPU picks up. Let’s take a look and see what we can do. We're happy to help!
Let's first try to perform an SMC reset on your device. This resource will help you perform that reset. We also recommend making sure your MacBook Pro is on a flat surface when the fans turn on. This will ensure the cooling system of your Mac will work properly.
How to reset the SMC of your Mac
Next, let's try to perform an NVRAM or PRAM reset on your device. This resource gathered will help.
Reset NVRAM or PRAM on your Mac
Lastly, let's check Activity Monitor to see what processes are using your CPU the most making the fans turn on and your computer to heat up.
Have a great day!
Welcome anoopsharma160,
Thanks for using the Apple Support Communities! We understand that when plugging in your computer to an external monitor the CPU picks up. Let’s take a look and see what we can do. We're happy to help!
Let's first try to perform an SMC reset on your device. This resource will help you perform that reset. We also recommend making sure your MacBook Pro is on a flat surface when the fans turn on. This will ensure the cooling system of your Mac will work properly.
How to reset the SMC of your Mac
Next, let's try to perform an NVRAM or PRAM reset on your device. This resource gathered will help.
Reset NVRAM or PRAM on your Mac
Lastly, let's check Activity Monitor to see what processes are using your CPU the most making the fans turn on and your computer to heat up.
Have a great day!
Thanks brenden!
Now cpu consumption is very less. Thanks for your valuable support and time!!!
HI Brend,
I am still facing this issue, even after resetting SMC and PRAM, Can you please figure out why it is happening again and again.
My laptop is getting slow down after connecting with extended monitor
