Mac OS Sierra and High Sierra occupies 95GB on my MacBook Pro 2017 128GB Edition. How to Clean?

Solution 1:

The window you showed gives only a basic view of the disk usage. For more thorough inspection, use the following command:

du -sh <folder>/*

Note 1: Use sudo for folders where your user does not have sufficient permissions, e.g.

$ sudo du -sh /*
 41G    /Applications
 17G    /Library
  0B    /Network
7,1G    /System
1,2T    /Users

Note 2: Add <folder>/.* to include hidden files, e.g.

$ du -sh ~/* ~/.*
592M    /Users/Mirek/Applications
8,6G    /Users/Mirek/Desktop
 14G    /Users/Mirek/Documents
 19G    /Users/Mirek/Downloads
 32K    /Users/Mirek/.DS_Store
  0B    /Users/Mirek/.TemporaryItems
687G    /Users/Mirek/.Trash

Or you can use a GUI application like DaisyDisk.