TidyMacDefinition
The pool of space that all the volumes on an Apple file system disk share.
Your startup disk is one container with several volumes: System, Data, Preboot, Recovery and VM. They all draw from the same free space. diskutil apfs list shows them. Terminal commands
Let TidyMac do this for you
Scan free, see every part of your storage explained, and clean only what’s safe. Everything goes to the Trash first.