Your Mac has one job during a long call or document review: stay awake.
Naturally, it sometimes chooses drama.
The screen dims. The machine locks. Slack goes quiet. A download pauses. You come back from reading something properly and your Mac has behaved like it has been abandoned in a forest.
If that keeps happening, here is what to check.
Start with macOS settings
The first place to look is System Settings.
On newer versions of macOS, go to Battery or Lock Screen settings and check how quickly your display turns off, how soon the Mac locks, and whether those settings change when plugged in.
If you are on a laptop, there may be different behaviour on battery and power adapter. That catches a lot of people out.
You think you changed the setting. macOS thinks you only changed it for one power mode. Very on brand.
Display off is not always sleep
A dark screen does not always mean the Mac is asleep.
Sometimes the display turns off while the system keeps running. Other times the Mac sleeps properly. That difference matters.
If you are on a call, running a download, watching a demo, or keeping apps available in the background, full sleep is the bigger problem.
- Display sleep is annoying
- System sleep is the one that breaks things
If you want a deeper run through the options across both platforms, our guide on how to keep your computer awake covers the common settings and tools.
Why Slack may still show away
Keeping your Mac awake helps, but it does not always mean Slack will keep showing you as active.
Slack says desktop users are set away after 10 minutes of desktop inactivity. So even if your Mac is awake, Slack may still change availability if there is no activity for long enough.
This is why you can be reading a document or watching a call and still appear away.
- Your Mac is awake
- You are working
- Slack sees quiet
Three true things, one annoying result. If this is your main frustration, there is more detail on how to prevent Slack going idle during legitimate work.
Use status messages where they help
For Slack, a simple status can do a lot.
If you are reading, in focus time, on a call or reviewing something, set a short status so people know what is going on.
Something like:
- "Reading docs"
- "On a call"
- "Focus time"
- "Reviewing, slower replies"
That will not stop your Mac sleeping, but it does reduce the weird social panic around a tiny dot.
When a keep-awake tool helps
A keep-awake tool is useful when you do not want the Mac to sleep during a task.
Good examples:
- Long calls
- Downloads
- Screen sharing
- Reading long documents
- Monitoring dashboards
- Testing a workflow
These are all legitimate reasons to stop your machine going idle too quickly.
The key is control. You want to run it when needed, stop it when done, and avoid leaving your machine awake for no reason.
When you need more than keep-awake
If your issue is only sleep, a keep-awake setting may be enough.
If your issue is presence in apps like Slack, sleep prevention may not be enough on its own.
For that, you may need controlled desktop activity too. Not random chaos. Not clicks flying around your screen like a toddler with admin rights.
Just activity in a screen area you define. If clicking is what you need, an auto clicker for Mac gives you that control without changing a load of settings each time.
Where Green Dotter fits
Green Dotter is a free Mac and Windows app. On Mac, it can help keep your computer awake and automate mouse clicks in a screen area you choose.
It is useful for reading, calls, long documents, repetitive workflows and working in another app, where your Mac might otherwise go idle or your presence might look wrong.
It runs locally and does not connect to Slack or any workplace account.
Always follow your workplace policies and the rules of any tools you use.
Green Dotter is an independent tool and is not affiliated with, endorsed by, or sponsored by Apple, Slack Technologies, LLC, Salesforce, Zoom, Microsoft, or any other third party.
FAQ
How do I stop my Mac sleeping during Slack?
Check your macOS Battery and Lock Screen settings first. Then use a keep-awake tool if you need your Mac to stay awake during longer work sessions.
Will keeping my Mac awake keep Slack active?
Not always. It helps prevent sleep, but Slack availability can still depend on desktop activity.
Why does my Mac go idle during long documents?
Your sleep or lock settings may be too aggressive, especially on battery power.
Can Green Dotter keep my Mac awake?
Yes. Green Dotter includes a keep-awake option and controlled click automation for Mac.
A note on workplace policies: how you handle presence depends on your role, your tools, and your employer's policies. Before relying on any presence or automation tool, make sure you understand what is allowed on your work device.
Related reading: try the auto clicker for Mac, learn how to keep your Mac awake, or see how to prevent Slack going idle.