caffeinate 命令

常用示例

说明

caffeinate creates one or more IOKit power-management assertions to suppress different kinds of sleep. It is the supported way to prevent macOS from entering display, idle, disk, or system sleep for the duration of a task. When invoked with a utility, caffeinate forks and runs the utility with the assertion(s) held until the utility exits. Without a utility, it runs until it receives a signal (e.g. Ctrl-C) or until `-t` expires. Multiple flags may be combined; each adds its own assertion.

参数

-d

Prevent the display from sleeping.

-i

Prevent the system from idle sleeping. (default when no assertion flag is given)

-m

Prevent the disk from idle sleeping.

-s

Prevent the system from sleeping. Only effective when plugged into AC power on a laptop.

-u

Declare that the user is active. The assertion is released automatically after 5 seconds (or sooner if cancelled) — useful to bump activity without holding it indefinitely.

-t _timeout_

Release the assertion after _timeout_ seconds. Without this flag the assertion holds until caffeinate is terminated or the wrapped utility exits.

-w _pid_

Hold the assertion until the process with the given PID exits.