MacOS System Storage 过大

System 占用过大的原因:
Time Machine 开启自动备份, 如果没有连接到外接的备份盘, 会在本地存储空间足够的情况下进行备份, 在删除快照之后, 系统占用空间会大量自减少.

• 查看 Snapshots

  sudo tmutil listlocalsnapshots /
  

  会得到类似信息:

  com.apple.TimeMachine.2017-10-02-132639
  com.apple.TimeMachine.2017-10-02-175507
  com.apple.TimeMachine.2017-10-02-200417
  com.apple.TimeMachine.2017-10-02-235853
  com.apple.TimeMachine.2017-10-03-112713
  com.apple.TimeMachine.2017-10-03-112934
  com.apple.TimeMachine.2017-10-03-113254
  

• 删除 Snapshot

  # 指定时间标签
  sudo tmutil deletelocalsnapshots 2017-10-03-113254