Came to say this. I've used it for years. Simple and works great!
chopete3 13 hours ago [-]
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.
The dummy display enables “clamshell mode,” which lets your MacBook stay awake even with the lid closed, provided that it’s also on AC power. If the MacBook is not connected to power, the clamshell mode isn’t activated and it will sleep normally.
Adrafinil simply disables the global sleep without spoofing hardware, and re-enables it once the agent is done working, the temperature is too high, or the battery is low.
chopete3 12 hours ago [-]
My requirement was to keep the laptop on with the lid closed. Sleep normally when idle but wake up when a nomachine request comes in.
I will see how this app fits into my specific need.
I have to check this on Mac Sequoia 15.7
kageroumado 11 hours ago [-]
The app is built for 26+, as I never tested it on earlier versions. It won’t solve your specific case, though, as it only prevents sleep. It won’t wake it once it’s already sleeping.
bluedino 13 hours ago [-]
Can't you just use a hot corner configured as "prevent sleep"?
fragmede 13 hours ago [-]
How does it sleep when the agent is done working with the hot corner?
doubled112 13 hours ago [-]
Have the agent write an app that moves the cursor our of the hot corner and trigger it when done.
darig 12 hours ago [-]
[dead]
47 10 hours ago [-]
I have been using the builtin macOS `caffeinate` command for this.
For example:
caffeinate -dimsu
That keeps the Mac awake so I can use Claude remotely from phone.
You can also wrap your command as well, but I rarely use it.
caffeinate -dimsu your-agent-command
zxexz 10 hours ago [-]
Caffeinate is burned into my muscle memory at this point. I attribute that to the realization that you could repeat opt flags. There's something catchy about
caffeinate -dimsum
kageroumado 9 hours ago [-]
Claude Code actually uses caffeinate -i -t 300 during Claude’s turn, restarted automatically until the turn finishes.
steve-atx-7600 9 hours ago [-]
The new wave apps named after speed / modifinil must be hard core?
processunknown 13 hours ago [-]
Does it also make my Mac irritable?
loeg 8 hours ago [-]
I guess we are getting the entire modafinil, R-modafinil extended universe.
kageroumado 13 hours ago [-]
Probably less irritable than amphetamine~
aqme28 13 hours ago [-]
Thank goodness. I can’t leave my laptop for a second unattended because my cat loves nothing more than to dance on the keyboard. I’ve need something like this.
dcan 5 hours ago [-]
Does closing the M-series laptop lid no longer throttle the CPU like it did on the Intel ones?
rancar2 13 hours ago [-]
For MacOS, keep awake with:
sudo pmset -a disablesleep 1
Reset back:
sudo pmset -a disablesleep 0
kageroumado 12 hours ago [-]
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.
xbar 12 hours ago [-]
Nice. I needed this yesterday, and will need it again today.
hamza_q_ 10 hours ago [-]
This works great. Only downside is display doesn't turn off when you close the lid. Made a little status bar utility to wrap the disablesleep command and address that downside:
(yes, I know, another *afinil named Mac sleep prevention app? but hey, I was first :P)
freakynit 6 hours ago [-]
Just tried. Bare minimal and does exactly what's needed and nothing else. Love it. Thanks..
hamza_q_ 6 hours ago [-]
np cheers mate
kageroumado 9 hours ago [-]
Afinils are cool, and your app is cool too~
hamza_q_ 7 hours ago [-]
Indeed.
Thanks!
lellow 11 hours ago [-]
Interesting. Kind of similar in purpose, but I created a simple app to schedule and type the "continue" word in my terminal after X time has passed, since I have to wait for my usage to be restored. =)
dawnerd 13 hours ago [-]
But Amphetamine has an option to end when an app closes. I’m just so confused why everyone using ai is reinventing solutions that already exist.
kageroumado 13 hours ago [-]
Claude Code or Codex (normally) don’t close the terminal window after a turn ends, they wait for the user’s reply.
neoecos 12 hours ago [-]
I think the same...It happend to me that I just ask Claude to build whatever I need for my personal very specific use case without looking what else it's outhere
conception 13 hours ago [-]
Easier to ask Claude than ask google I guess.
10 hours ago [-]
flexagoon 13 hours ago [-]
Everyone dreams about making the next cool AI tool and doesn't bother checking if someone has already made the same thing years ago without the word "AI" in the description
kageroumado 11 hours ago [-]
In order to get the same behavior with Amphetamine you’ll need to:
1. Install it from the AppStore (no brew, no GitHub)
2. Not forget to enable lock on lid close
3. If you ever connect/disconnect power while the lid is closed without the optional “Power Protect” system, the MacBook will sleep. The system is a script and a configuration file making sudo pmset -a disablesleep passwordless.
4. Add hooks to Claude Code configuration that will use Apple Script to start and stop Amphetamine sessions. For Codex you’ll have to make a script that will watch process activity to know when a turn ends.
It’s not like Amphetamine can’t do the same, it’s that this app is made specifically for AI agents and nothing else.
9 hours ago [-]
mr_toad 11 hours ago [-]
I’ve often wondered about the thermal performance or running a MacBook with the lid closed. One argument is that the reduced surface area from a closed lid increases temperature. Others argue that not running & rendering the display (and thus GPU) generates less heat. I’m not sure who to believe.
herrkanin 11 hours ago [-]
Running lid closed with external display has been officially supported since forever so I wouldn't worry about it too much.
strus 4 hours ago [-]
I am always baffled how many people does not know about Amphetamine.
NDlurker 5 hours ago [-]
Adrafinil never seemed to work for me. I tried it a few times when I worked an overnight shift.
tam159 6 hours ago [-]
It would be great if adrafinil can also track the battery and token usage while agents are working
It’s an Electron app that uses powerSaveBlocker to prevent display sleep. It won’t prevent macOS system sleep on lid close with no power.
AussieWog93 6 hours ago [-]
Thanks. This one looks much better!
geor9e 10 hours ago [-]
Codex recently built this in - "Prevent sleep while running" toggle
moralestapia 13 hours ago [-]
What's old is new again, but I welcome this.
I used to do this 15 years ago to keep listening to music from my laptop (one of the white chiclet ones) in my backpack, can't remember the name of the app I used then.
One caveat, your laptop cannot cool inside a backpack, it will overheat and shut down anyway. This happened to me several times.
kageroumado 13 hours ago [-]
It has a setting for thermal cutoff that you can set to something like 60º C. Sleeping will stop heavy work (like a build) before it leads to overheating.
dmd 13 hours ago [-]
that was true of intel but definitely not of arm macbooks.
There were mac apps called caffeine and amphetamine years ago.
oenton 4 hours ago [-]
In that case from what I understand, Adrafinil has a much lower abuse potential than amphetamines, in particular because it doesn't give you a rush. If we're going to name mac apps after pharmaceuticals then this feels a little bit classier. No rush, just steady wakefulness.
hamza_q_ 7 hours ago [-]
Was referring to the *afinil specifically
operatingthetan 7 hours ago [-]
Alright, well I guess I thought were were talking about naming apps after stimulant drugs lol.
Adrafinil's discovery and use predates Modafinil, I believe.
operatingthetan 12 hours ago [-]
I admire your pharma knowledge.
10 hours ago [-]
kylehotchkiss 7 hours ago [-]
`sudo pmset -a sleep 0`
2001zhaozhao 10 hours ago [-]
We need people to rediscover remote development desperately, lol.
IncreasePosts 10 hours ago [-]
At some point, if you closed the lid and didn't have an external monitor plugged in, macos would put the GPU in power save mode, which would tank local llm performance. Is that not the case any more? There were even small singles you could get which would trick the ps into thinking an external monitor was plugged in
loeg 8 hours ago [-]
I don't think this is for running local llms.
WUMBOWUMBO 13 hours ago [-]
reminds me of ye old caffeinate
kageroumado 13 hours ago [-]
Caffeinate doesn’t prevent sleep with the lid closed.
13 hours ago [-]
13 hours ago [-]
cyanydeez 12 hours ago [-]
you can run opencode inside a docker container and expose it's webui.
https://apps.apple.com/us/app/amphetamine/id937984704?mt=12
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
Adrafinil simply disables the global sleep without spoofing hardware, and re-enables it once the agent is done working, the temperature is too high, or the battery is low.
I will see how this app fits into my specific need.
I have to check this on Mac Sequoia 15.7
For example:
caffeinate -dimsu
That keeps the Mac awake so I can use Claude remotely from phone.
You can also wrap your command as well, but I rarely use it.
caffeinate -dimsu your-agent-command
caffeinate -dimsum
sudo pmset -a disablesleep 1
Reset back:
sudo pmset -a disablesleep 0
https://github.com/narcotic-sh/modafinil
(yes, I know, another *afinil named Mac sleep prevention app? but hey, I was first :P)
Thanks!
It’s not like Amphetamine can’t do the same, it’s that this app is made specifically for AI agents and nothing else.
I used to do this 15 years ago to keep listening to music from my laptop (one of the white chiclet ones) in my backpack, can't remember the name of the app I used then.
One caveat, your laptop cannot cool inside a backpack, it will overheat and shut down anyway. This happened to me several times.
(personally I have Ruby scripts that check activity on "tmux capture-output" for that)
https://ghloc.vercel.app/kageroumado/adrafinil?branch=main
https://github.com/narcotic-sh/modafinil
He's a connoisseur.