[ Link: https://chatgpt.com/share/6934ada6-1ad0-800f-bf7d-80e24c8adbc4 ]

Here’s a super-simple macOS script that prevents the system from sleeping using the built-in caffeinate command.

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✅ Option 1: Run indefinitely (most common)

keep-awake.sh

#!/bin/bash
# Prevent macOS from sleeping indefinitely

caffeinate -dis

• -d → prevent display sleep

• -i → prevent system idle sleep

• -s → prevent system sleep on AC power

➡️ Run it:

chmod +x keep-awake.sh
./keep-awake.sh

Press Ctrl + C to stop and allow normal sleep again.

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✅ Option 2: Prevent sleep for a specific duration

Example: keep awake for 2 hours.

#!/bin/bash
# Prevent macOS from sleeping for 2 hours

caffeinate -dis -t $((2 * 60 * 60))

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✅ Option 3: Minimal one-liner

If you don’t want a script:

caffeinate -di

This alone prevents macOS from sleeping and turning off display until stopped.

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⚡ Bonus: Show a message so you know it’s active

#!/bin/bash
echo "☕ macOS will not sleep while this is running. Press Ctrl+C to stop."
caffeinate -dis

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If you want, I can also create a menu bar version, launchd auto-start, or a toggle on/off script.