Caught the culprit of macOS system data

Terminal input ``` diskutil list ``` Focus on ``` APFS Snapshot com.apple.os.update-... 10.3 GB diskXXXX ``` [Online information shows] (https://arstechnica.com/gadgets/2020/11/macos-11-0-big-sur-the-ars-technica-review/# page-11) From * * Catalina * * A security mechanism is introduced to handle update files, which increases with time and update frequency. mac will automatically manage and regularly remove redundant files in this volume, but the actual experience is that the system will only allow it to continue to grow. * * The faster the system is updated, the larger the directory will be * *. The cleaning method is to temporarily close the SIP mount directory. For details, the directory can be sorted out. Currently under research... If V friends find other findings, please feel free to share them below.