首先列出所有的快照记录
JokerdeMacBook-Pro:~ joker$ tmutil listlocalsnapshots /
com.apple.TimeMachine.2018-04-14-155705
com.apple.TimeMachine.2018-04-14-222828
com.apple.TimeMachine.2018-04-14-232758
com.apple.TimeMachine.2018-04-15-210634
com.apple.TimeMachine.2018-04-15-220449通过指令瘦身快照（执行结果没有提示任何快照被瘦身，意味着现在的快照处于一个占用空间较小的水平）
JokerdeMacBook-Pro:~ joker$ tmutil thinlocalsnapshots /
Thinned local snapshots:
com.apple.TimeMachine.2018-04-14-222828
com.apple.TimeMachine.2018-04-14-232758删除快照
JokerdeMacBook-Pro:~ joker$ tmutil deletelocalsnapshots 2018-04-14-155705
Deleted local snapshot '2018-04-14-155705'
原文地址：http://jokehanj.com/index.php/2018/04/16/z_h_mac_d_s_k_j/
