Why is sysmond draining your Mac's CPU? Causes and fixes

If you’ve seen sysmond high CPU usage on your Mac in Activity Monitor, you might be thinking, is that what’s causing my device to feel a bit slow? And you wouldn’t be the first person to think that. But sysmond is actually a pretty harmless system process, so before you start deleting any important system files or trying to stop the process in Activity Monitor, let me walk you through what it is and what you can do safely to bring your Mac back to speed.

What is sysmond high CPU usage on Mac?

It’s simply a System Monitor Daemon that’s part of Activity Monitor; it actually helps to gather all the data that Activity Monitor displays. So it’s a totally normal and benign macOS process. Basically, no need to panic, and just to be very clear, it’s absolutely not a virus either. The reason it’s open is that Activity Monitor is.

Why does it spike

From what I’ve researched, brief CPU spikes are considered normal when Activity Monitor is open (especially on the Memory tab) or when the update frequency is set to 1 second.

The process should settle on its own after a few minutes, so keep an eye on it without doing anything else.

If you find that it stays at high usage, particularly over a long stretch of time, and you’re noticing a bit of a slowdown on your Mac, excessive heat, or maybe even blazing fans, that could indicate another problem. In that case, it’s still worth working through all the fixes below, though.

Quick fixes for sysmond high CPU usage on Mac

Work your way through these fixes to see if you can give your Mac a bit more bandwidth.

1. Quit and reopen Activity Monitor

This might be the only fix you need, so don’t forget to try it.

2. Lower the update frequency

With Activity Monitor open, press View > Update Frequency > Normally (5 sec).

3. Wait some things out

If you’re backing up your Mac, doing some general troubleshooting, or you’ve got a lot of apps open that you’re actually using, just wait to see if the spikes calm down on their own. Essentially, if you’re actively using your Mac, then spikes in CPU are pretty normal.

4. Restart your Mac

Finally, give your Mac a quick restart from the main Mac menu to clear up any stuck states.

What to do when CPU usage stays high

So, if CPU usage remains high, it’s time to dig a little bit deeper. One thing I want to say here is, contrary to what you might see in some other help articles, don’t try to delete any system files named sysmond, or try to kill the sysmond process from Activity Monitor itself; it’s a core daemon, and this just won’t help. It actually might cause your device some harm.

Instead, you need to figure out what could be consuming your Mac’s resources; I’d try a few things first. Close any heavy apps you’re not actually using. Turn off any unnecessary background items and make sure that your macOS is running the latest software update. Keep an eye on that in System Settings > General > Software Update.

If you’re short on time, another easy way to spot and stop resource hoggers is by using the CleanMyMac’s Menu App. I rely on this daily because it shows me live CPU and memory updates and lets me quit the top consumers directly without having to dig around my Mac or inside apps.

If you haven’t tested this tool yet, it’s worth a try; you can even test it for 7 days — get your free trial here.

Rule out malware

In rare cases, excessive and prolonged CPU usage can be a sign of malicious software, so it’s probably worth running an extra scan with your antivirus software, and I’d also check your login items list to make sure there’s no malicious background process running there, too. Just go to your System Settings > General > Login Items & Extensions.

You could also use the Protection feature from CleanMyMac, too; it can rule out malware for you quickly.