Cleaning up macos junk?

Question

macOS

Hello. I have a macbook that is 2 years old.
How to clean the system from various garbage? Since I installed many different programs and packages during this time.
Or is it easier to format the drive and install the system again?

Answer 1

Formatting and rearranging the system is the best option.

Answer 2

Reset and reinstall the system, leaving the necessary files by copying to a third-party drive.
Video how to reset the system.