Journal
A long agent run has one enemy: your Mac going to sleep. These guides explain exactly when that happens and how to stop it using only what macOS ships with — and they're honest about where the built-in tools stop working, which is the gap UnIdle fills.
How Mac sleep works
Start here
The 23:52 problem: what macOS does when you shut the lid mid-run
Why caffeinate can't save you here, and the two things that can.
6 min read · Oct 2026
Built-in tools
caffeinate, flag by flag
Keep your Mac awake for exactly one command — and the three things it can't do.
4 min read · Oct 2026
Built-in tools
Lock, display sleep, system sleep: only one kills your agent
Three things that look the same from across the room, and the settings behind each.
5 min read · Oct 2026