vmstat: command not found

Mac使用系统监控命令vmstat提示下面错误：

chandler@ChandlerdeMacBook-Pro ~ % vmstat -v
zsh: command not found: vmstat

因为Mac使用的是vm_stat，特别记录一下：

chandler@ChandlerdeMacBook-Pro ~ % vm_stat       
Mach Virtual Memory Statistics: (page size of 4096 bytes)
Pages free:                              111180.
Pages active:                           1519593.
Pages inactive:                         1477754.
Pages speculative:                        40760.
Pages throttled:                              0.
Pages wired down:                        767152.
Pages purgeable:                         586692.
"Translation faults":                 362914033.
Pages copy-on-write:                    9314765.
Pages zero filled:                    286680579.
Pages reactivated:                      5825270.
Pages purged:                           1986983.
File-backed pages:                       600641.
Anonymous pages:                        2437466.
Pages stored in compressor:              984663.
Pages occupied by compressor:            277410.
Decompressions:                         5580331.
Compressions:                          11668507.
Pageins:                                8050564.
Pageouts:                                 46283.
Swapins:                                2288375.
Swapouts:                               2383825.