best way to clean up MacBook pro
Best Way to Clean Up a MacBook Pro
iOS 11.2.1
If by "Clean Up" you mean the operating system and associated applications and data, then a complete "clean" install of the operating system would be the "best way." This would require that you have recent, verified backups before you do this type of install.
Ref:
- Get your Mac ready for High Sierra - Apple Support
- How to Clean Install MacOS High Sierra - OSXDaily