# Keep your Mac awake with caffeinate

#### July 12, 2022

Today I needed a way to prevent my Mac from going to sleep while downloading a big file. Turns out macOS has a convenient utility called caffeinate that helps keep your Mac awake.

We really live in the future. Over the past few years I’ve acquired more and more “devices” that needed charging, including watch, toothbrush, and car. And apparently that’s not enough because these devices need upgrading now too! Okay, maybe not the toothbrush. At least not so far.

It is the case however for the car, which every few months prompts me to download the latest “software of the touchscreen” (with a French accent). Peugeot makes really good cars but somehow manage to mess up anything that involves software. Dashboard’s not really a problem since I can bypass most the Peugeot non-Operating System with Apple CarPlay, but the iPhone app is an endless source of despair, a trait it somewhat shares with the “Peugeot Update” macOS app.

Fortunately macOS comes with a handy utility called caffeinate that helps you instruct your Mac not to go to sleep:
$man caffeinate CAFFEINATE(8) System Manager's Manual CAFFEINATE(8) NAME caffeinate – prevent the system from sleeping on behalf of a utility SYNOPSIS caffeinate [-disu] [-t timeout] [-w pid] [utility arguments...] ... And while setting a long timeout value would have worked, I decided to simply tell caffeinate to allow my Mac to go back to sleep after the Peugeot Update was done: $ pgrep -i 'peugeot update' | head -n 1
\$ caffeinate -w 63949