Why You should not upgrade your MacBook Pro to Big Sur

  1. Your machine have no discrete GPU or not using external display.
  2. You use your machine in a very very cold room.
  3. Consider this article

Why discrete GPU on MacBook sucks?

source: https://ozmoroz.com/2020/07/macos-kernel-tasks/
https://youtu.be/rkCFnOW_P0Y?t=786

So, how do we handle these issues?

  1. Waiting for Apple to fix this.
  2. Improve the cooling system
  3. Buy another machine, be it a MacBook without discrete GPU or others.
  4. Pray to resolve it.
  5. Downgrade.
graph with https://bjango.com/mac/istatmenus/

Lets start the downgrade thing

  1. Downgrade using time machine.
  2. Downgrade using external drive.
  3. Downgrade using Internet Recovery mode.
  1. Make sure you have internet connection.
  2. Do back up your files!
  3. If you want to reinstall last used macOS, do reinstall macOS in the recovery mode:
source: https://www.imore.com/how-downgrade-macos

Step to erase macOS and Install your machine’s first macOS

  1. Shut down your machine.
  2. Hold down Command+R, and keep holding the keys until your computer reboots. This will put your computer into Recovery Mode.
  3. Click on Disk Utility in the OS X Utilities selector.
  4. Choose your drive and click on Erase.
  5. Change the format to MacOS Extended (Journaled).
  6. Change the name of your drive to something else.
  7. Quit Disk Utility.
  8. Restart.
  9. Hold down Command+R again until Recovery Mode.
  10. Provide your wifi credentials.
  11. After loading is done, you can go Install macOS with first macOS on your machine.
  12. Do the install thingy, next next and you’re done.

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