AfterLidWhat caffeinate does well
Caffeinate is a macOS command that holds power assertions while it runs. For a two-hour session that prevents idle system sleep, use:
caffeinate -i -t 7200Keep the command running with the lid open. Control+C stops it early. The -i option concerns idle system sleep; it does not keep the display lit. The separate -d option concerns display sleep. You can inspect all options on your own Mac with man caffeinate.
You can also launch a command-line task through caffeinate so the assertion follows that task’s lifetime. That is useful for scripts and builds. For an occasional download or export, the timed command may be all you need.
What changes with AfterLid
| Need | Caffeinate | AfterLid |
|---|---|---|
| Occasional lid-open task | A built-in command can be enough | Awake provides an app control |
| How you interact | Terminal flags and a running process | Named power modes in the desktop app |
| Display behavior | Selected through command flags | Awake keeps the display awake too |
| Phone companion | Not part of caffeinate | Status for a linked computer; remote mode controls require Pro |
| Where the job runs | On your Mac | On your computer, not an AfterLid cloud |
Choose for the routine you actually have
Use caffeinate if you are comfortable with Terminal and only need a temporary session. It does not require an AfterLid account or subscription.
Consider AfterLid if you want a visible control you can return to, switch between normal sleep and awake work, or use the companion features after linking your computer. Check the current app and plan details during setup; do not buy a plan just to solve a problem the built-in command already handles.
In AfterLid, Sleepy restores normal sleep behavior. Awake is the lid-open mode and keeps both the system and display awake. This comparison does not recommend either option as a general way to override lid-close sleep.
Neither tool fixes every interrupted job
Keeping a Mac awake will not recover a crashed editor, reconnect an unavailable server or prevent every system-level interruption. Keep ventilation clear, use appropriate power and test your setup with a short task first.
For steps tied to a specific job, read keeping downloads running or preparing for a long render.
Sources and scope
Command options checked against the macOS caffeinate(8) manual. For system settings, see Apple’s sleep and wake documentation. This guide focuses on preventing idle sleep with the lid open, not bypassing system protections.