macOS offers two main power options: sleep and shutdown. Sleep keeps your session in memory, allowing quick resumption, and supports Power Nap for background tasks like email syncs and Time Machine backups when plugged in. It uses minimal battery—especially on Apple silicon models—and automatically hibernates when the battery is critically low.

Shutdown fully closes apps, clears RAM, and draws no power. It’s ideal for troubleshooting or long inactivity. Apple advises closing the lid only after the screen is off to avoid slower startups.

You can bypass the shutdown countdown by holding Option, and restart from the Apple menu for minor issues, though it doesn’t fully cut power like a shutdown does. On MacBooks, a quick press of the Touch ID button locks the device; holding it forces a shutdown—only use this if the system is unresponsive, as unsaved work will be lost.