Mac os x system usage

How to Check Your Mac’s Performance with Activity Monitor When the chart begins to show yellow, it indicates that cached files similar to inactive memory in earlier versions of Activity Monitor , essentially apps that are no longer active, but still have their data stored in RAM, are being compressed to create enough free RAM to assign to the apps requesting an allocation of RAM. When memory is compressed, it requires some CPU overhead to perform the compression, but this small performance hit is minor, and probably not noticeable to the user.

When the memory pressure chart begins to display in red, it means there's no longer enough inactive RAM to compress, and swapping to disk virtual memory is taking place. The memory pressure chart actually makes it much easier to tell at a glance if you would benefit from additional RAM. In previous versions of OS X, you had to check the number of page outs that were occurring, and perform a bit of math to come up with the answer.

How To Use Activity Monitor On Your Mac

With the memory pressure chart, all you need to do is see if the chart is in red, and for how long. If it stays there for a long period, you would benefit from more RAM. If your chart is often in the yellow, then your Mac is doing what it's supposed to do: make the best use of your available RAM without having to page data to your drive.

You're seeing the benefit of memory compression, and its ability to use RAM economically and keep you from having to add more RAM. Instead, it tries to free up memory that was previously allocated to apps, and then, if needed, page memory to your drive virtual memory.

How to See CPU Utilization on a MacBook Pro

The Activity Monitor pie chart shows four types of memory usage: Free green , Wired red , Active yellow , and Inactive blue. In order to understand your memory usage, you need to know what each memory type is and how it affects available memory. This one is pretty straightforward. It's the RAM in your Mac that isn't currently in use and can be freely assigned to any process or application that needs all or some portion of available memory.

Wired memory represents the minimum amount of RAM your Mac needs at any point in time to keep running. You can think of this as memory that's off limits for everyone else. This is memory currently in use by applications and processes on your Mac, other than the special system processes assigned to Wired memory.

You can see your Active memory footprint grow as you launch applications, or as currently running applications need and grab more memory to perform a task. This is memory that's no longer required by an application but hasn't yet been released to the Free memory pool. Most of the memory types are pretty straightforward. The one that trips people up is Inactive memory. Individuals often see a large amount of blue in their memory pie chart Inactive memory and think they're having memory issues. This leads them to think about adding RAM to boost their Mac's performance.

But in reality, Inactive memory performs a valuable service that makes your Mac snappier. When you quit an application, OS X doesn't free up all of the memory the application used. Instead, it saves the application's startup state in the Inactive memory section. Should you launch the same application again, OS X knows it doesn't need to load the application from your hard drive, because it's already stored in Inactive memory.

As a result, OS X simply redefines the section of Inactive memory that contains the application as Active memory, which makes re-launching an application a very quick process. Inactive memory doesn't remain inactive forever. As noted above, OS X could start using that memory when you re-launch an application. It will also use Inactive memory if there's not enough Free memory for an application's needs. The answer to that question is usually a reflection of the amount of RAM your version of OS X needs, the type of applications you use, and how many applications you run concurrently.

But there are other considerations. In an ideal world, it would be nice if you didn't have to raid Inactive RAM too often. This would provide the best performance when launching applications repeatedly while maintaining enough Free memory to meet the needs of any currently running applications. For instance, each time you open an image or create a new document, the related application will need additional Free memory.

If Free memory falls to the point where Inactive memory is being released, you may want to consider adding more RAM to maintain maximum performance. You can also look at the 'Page outs' value, at the bottom of Activity Monitor's main window. This number indicates how many times your Mac has run out of available memory and used your hard drive as virtual RAM. By using our site, you acknowledge that you have read and understand our Cookie Policy , Privacy Policy , and our Terms of Service.

I noticed that my Mac uses gigs of storage just for "system".

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I'm wondering if that's normal, because it seems outrageously high to me. I would imagine the OS would take up, certainly less than gigs under normal circumstances.

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The processes shown in Activity Monitor can be user apps, system apps used by macOS, or invisible background processes. Use the five. Mac OS X ships with a utility you can use to monitor which applications and to keep an eye on your system's CPU usage to diagnose a system slowdown or.

Type this command for each of those snapshots changing the date and you'll get a great amount of free space! I'm not entirely sure what Apple considers to be "System". Mine is using about 40GB. Apple's calculator seems a bit unclear and I'm unable to find an explanation of what is included in that breakdown. Here is my actual system usage:.

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I would suggest using a better application that does not use a generic breakdown, but will show you which large files are taking up so much space, perhaps something like Disk Inventory X. I restarted a few times and nothing seemed to happen.

What Else Can I Do to Reclaim More Disk Space?

I read an answer somewhere to an issue related to this that I could delete the com. The system couldn't read the size of the directory so I figured it was a problem folder, so I deleted it, emptied the garbage, and restarted. Disk Inventory X gave me different sizes than the System Information window and it didn't find any problematically large files. The com. Deleting that directory isn't harmful to the system as far as I know, and it regenerates when the OS needs it again.

You can also look at the built in Disk Utility.

I had the same problem. And my "About this Mac" was showing "System" space used as GB, thus showing that there was no disk space any more on my GB mac. So I spent some time found where this " GB" was being used. I removed that application and deleted this folder which resolved my problem. Note that deleting anything in a system folder can be harmful, so only do it if you know w. Its some kind of system temporary folder, in which you can find xcode publishing archives of different versions if you use xcode and lots of data, that could be restored when needed.

Monitor system resources from the menu bar in macOS Mojave | RAW Mac

My system went from to 43gb. Home Questions Tags Users Unanswered. Is there any way to cut down on how much storage is taken up by the system? See this previous question , and this similar one on apple. If you are on High Sierra then… it's TimeMachine fault.