安装了Homebrew:

brew install watch

或者，在你的~/。bashrc文件:(

function watch {
    while :; do clear; date; echo; $@; sleep 2; done
}

使用MacPorts:

$ sudo port install watch

我从这里开始回答:

bash -c 'while [ 0 ]; do <your command>; sleep 5; done'

但你最好装个手表，因为这不是很干净……

安装了Homebrew:

brew install watch

Linux上可用的watch命令在macOS上不存在。如果你不想使用brew，你可以将这个bash函数添加到你的shell配置文件中。

# execute commands at a specified interval of seconds
function watch.command {
  # USAGE: watch.commands [seconds] [commands...]
  # EXAMPLE: watch.command 5 date
  # EXAMPLE: watch.command 5 date echo 'ls -l' echo 'ps | grep "kubectl\\\|node\\\|npm\\\|puma"'
  # EXAMPLE: watch.command 5 'date; echo; ls -l; echo; ps | grep "kubectl\\\|node\\\|npm\\\|puma"' echo date 'echo; ls -1'
  local cmds=()
  for arg in "${@:2}"; do
    echo $arg | sed 's/; /;/g' | tr \; \\n | while read cmd; do
      cmds+=($cmd)
    done
  done
  while true; do
    clear
    for cmd in $cmds; do
      eval $cmd
    done
    sleep $1
  done
}

https://gist.github.com/Gerst20051/99c1cf570a2d0d59f09339a806732fd3