Show HN: Adrafinil – keep a lid-closed Mac awake only while agents work

Post by fragmede » Sat, Jun 27, 2026, 9:36 PM UTC

bluedino wrote: post #20

chopete3 wrote: post #11

This is great. Will check it. Recently I bought a usb-c empty external monitor card to prevent mac from going to sleep. There are many of these external monitor simulators on Amazon. I still see the laptop go to sleep many times with the external monitor simulator. This is the one I bought. 4K 60Hz USB-C Type-C Virtual Display Adapter DDC EDID Dummy Plug Headless Ghost Display Emulator 2K 60hz1080P@120Hz

Can't you just use a hot corner configured as "prevent sleep"?

Post by rancar2 » Sat, Jun 27, 2026, 9:38 PM UTC

Post by kageroumado » Sat, Jun 27, 2026, 9:43 PM UTC

WUMBOWUMBO wrote: post #16

reminds me of ye old caffeinate

Post by da_grift_shift » Sat, Jun 27, 2026, 9:46 PM UTC

fragmede wrote: post #19

xlii wrote: post #8

Um so it is sudo bash -c 'touch KEEP_RUNNING; pmset -b sleep 0; pmset -b disablesleep 1; while [ -e KEEP_RUNNING ]; do sleep 1; done; pmset -b sleep 5; pmset -b disablesleep 0' and Agent, when you're done do `rm KEEP_RUNNING`, kthxbye. ? (personally I have Ruby scripts that check activity on "tmux capture-output" for that)

https://news.ycombinator.com/item?id=9224

Post by xbar » Sat, Jun 27, 2026, 9:48 PM UTC

kageroumado wrote: post #28

rancar2 wrote: post #23

For MacOS, keep awake with: sudo pmset -a disablesleep 1 Reset back: sudo pmset -a disablesleep 0

This is exactly what the app does, except it ties it to agent activity and re-enables sleep once the turn ends, the laptop is close to overheating, the battery is low, or on a timer.