Mac Performance

How to Reduce the Windowserver CPU Usage on Mac

Anyone who uses a computer knows how frustrating it can be when it starts to slow down. This happens for several reasons. But one culprit we tend to overlook is the WindowServer using up too much CPU on your Mac.


If you’re clueless as to what that is or how it could possibly slow down your Mac, we’re here to help. This article will give you the lowdown on the WindowServer and show you how to lower its CPU usage on your Mac.

Before we start


The easiest way to free up space on your Mac is by cleaning it. While that sounds easy, it can be a tedious task to undertake manually, and you might not get the best results that way. You’d also have to keep making time to repeat the process every time your startup disk gets full. That’s why you need software that not only cleans your Mac but frees up disk space in the process. Fortunately, MacKeeper does that and more in just one click.

  1. Open MacKeeper
  2. Click on Safe Cleanup on the side bar
  3. Click on Clean Junk Files
  4. If any are found, MacKeeper will safely remove them

That’s just one of the many tools that come with MacKeeper. Download MacKeeper now to keep your Mac clean and in optimal condition.

What is WindowServer and why is it running on my Mac?  

Before we get into the nitty-gritty, let’s straighten this out: What is a WindowServer? The WindowServer is the system responsible for processing the graphical elements you see on your Mac’s screen.  


It’s one of the elements of your Mac that make it possible for you to read this article and view everything else you see on your screen. Every time you edit or move graphics on your screen, like when you drag a window from one place to another, the WindowServer redraws them.  


The WindowServer achieves this using CPU cycles. If you perform multiple graphic tasks at a time, WindowServer uses more CPU cycles. It’s one of the reasons why your Mac sometimes runs slowly.


Here are some scenarios where your Mac’s WindowServer will use up more CPU cycles:

  • Editing images in Photoshop or another editing software
  • Opening multiple windows at a time
  • A cluttered desktop
  • Apps with junk files

These are just a few examples, but there are many more habits that can cause your Mac’s WindowServer to use more CPU cycles.


If you’ve ever been worried about WindowServer, you should know that it is not a virus and poses no threat to your Mac. For that reason, there’s no need to force quit WindowServer.


Having said that, you should definitely try to keep its CPU usage low. But before you do that, you must first find out just how much CPU your Mac’s WindowServer uses.

How to check how much CPU your Mac’s WindowServer uses

By now, you‘re probably curious about just how much CPU your Mac’s WindowServer uses. Thankfully, there’s an easy way to find out. Here’s how:

  1. Go to Finder > Applications
  2. Double-click on the Utilities folder
  3. Open Activity Monitor
  4. Now click on the CPU tab
  5. Look for WindowServer on the list and check the percentage of CPU it is currently using
Activity Monitor

Anything under 60% is fine. However, if WindowServer is taking up more than that, it’s using more CPU cycles than it should. You need to consider reducing that usage.

How to reduce your Mac’s WindowServer CPU usage  

We now know that multiple factors can increase your Mac’s WindowServer CPU usage. Therefore, goes without saying that if you want your Mac to perform optimally, you have to lower its WindowServer CPU usage. Here’s how you can do that:

1. Restart your Mac

The quickest and simplest way to reduce your Mac’s WindowServer CPU usage is by restarting your device. This often solves a lot of problems and saves you time and energy. And you can do it in a few clicks, too:

  1. Click on the Apple icon in the top-left corner of the screen
  2. Scroll down and select Restart

Have trouble doing this? Learn how to force shut down a Mac that won’t turn off.

2. Declutter your desktop

It’s common for files to build up on your desktop over time. In many cases, these are downloads and duplicates you no longer need. That’s why you should make a habit of checking your desktop regularly and clean it up as needed.


If you really need to have files on your desktop, it’s better to organize them into folders. Otherwise, delete anything that doesn’t have to be on it.  


A more effective way to achieve this is to use MacKeeper’s Safe Cleanup tool. A more effective way to achieve this is to use MacKeeper’s Safe Cleanup tool. Take advantage of a one-time free use of Safe Cleanup. It's an easy-to-use software that finds and removes junk files from your Mac in just one click.


These include logs, caches, language files, and much more that can be missed by the human eye. But it doesn’t stio there—it continues to scan your Mac for these regularly, so you can remove them at the click of a button and optimize your device.


Here’s how to get started:

  1. Download and launch MacKeeper app on your Mac
  2. Click on Safe Cleanup in the left panel, under the Cleaning tab
  3. Check if all the file categories you want to be cleaned up are selected or click on the Check All box at the top
  4. Now click on Clean junk files
MacKeeper > Safe Cleanup

That’s it—just four easy steps to cleaning your desktop and Mac. You’ll find that it makes your Mac perform better.  


Here are more benefits to cleaning your desktop:

  • It looks breathable
  • It gives you peace of mind
  • It makes it easy to find what you’re looking for
  • It helps to keep your Mac’s WindowServer CPU usage low

Clean up your desktop and device often to free up memory on your Mac and ensure that your device stays in optimal condition.


Learn more ways to speed up your slow Mac.

3. Close windows you aren’t using

The WindowServer uses more resources if more windows are open on your Mac. For this reason, you must close any windows that you don’t need.

  • On Chrome, click on the window you want to close at the top of your Mac’s screen, and then click on the X in the center of the tab
Google Chrome
  • On Safari, hover over the tab you want to close, and then click on the X on the left of the tab

Don’t forget to close tabs every time you’re done using them, or at the end of your work or school day to get a better handle on things.


Clear browser history from your computer and Google to remove traces of your online activity.  

4. Manage your apps

Your computer is probably filled with apps you don’t use. You’d probably be shocked to learn that some of those apps have hidden files that may be slowing your computer down. That’s why it’s best to consolidate your apps and delete each one that you don’t use frequently.


MacKeeper’s Smart Uninstaller is the best choice for this.

MacKeeper > Smart Uninstaller

It finds and deletes the following on your Mac:

  • Unwanted apps
  • Hidden apps
  • Leftover files that can be otherwise easy to miss

Of course, you can do this manually. However, that leaves room for human error, as you’re likely to miss files hidden deep within your apps and Mac. And besides, this can be a tedious process, so why not enlist the help of a trusted app to do it for you?

5. Reduce your Mac’s display transparency

Visual effects also use up more CPU on your Mac. Of course, you can’t turn off every visual effect, but you can reduce the display transparency, which will make a significant difference.  


Here’s how:

  1. Open System Preferences in the taskbar
  2. Click on Accessibility > Display in the left panel
  3. Now click on the checkbox next to Reduce transparency
System Preferences > Accessibility

This should make your Mac run smoother than before.

6. Update to the latest macOS

Running an older version of macOS is the reason for many issues on your Mac—including performance issues and, more importantly, having your privacy at risk. Many times, you don’t realize you haven’t updated it until your device starts running slowly.


It’s easy to update macOS. Follow the steps below to get started:


1. Click on the Apple icon in the top-left corner of your Mac


2. Select System Preferences


3. Click on Software Update. Your Mac will quickly check for any available updates and show you the latest one

System Preferences > Software Update

4. Check the box next to Automatically keep my Mac up to date to ensure you don’t miss any updates in the future


5. Now click on Restart Now to update macOS

Software Update

Learn more about updating your Mac Operating System and installed apps.

7. Close other windows  

If updating your macOS doesn’t work, you have one more option to try: close other windows in Mission Control.  


If you’re wondering what that is, it’s where you can get a snapshot of the following in full-screen or split-screen view. It also makes it easy to switch between them:

  • Open windows on your Mac
  • Desktop spaces
  • Apps

In simpler terms, it allows you to get a quick view of everything you’re working on at the time. It’s especially helpful when multitasking or when you have a lot on your plate.


Now let’s look at how to close other windows in Mission Control. This will help you get a better handle on your tasks and prevent your device from slowing down as a result of having too many windows open. Do this every time you’re done using a window or app.


1. While several apps are open, double-click on an app icon in the taskbar


2. Select Show All Windows

Show All Windows

3. Click on the X in the top-left corner of the window

Close Window

Repeat this step for all open windows—it’s quick and easy to do.

Help your Mac work optimally again

You’ve learned that your Mac’s WindowServer can use up a lot of CPU, which can, in turn, slow down your computer. You can now take the necessary steps to lower its CPU usage. Follow the guidelines in this article to do just that and have your Mac working optimally in no time.

Use your Mac to the fullest! Sign up and get:
Effective tips on how to fix Mac issues
Reliable advice on how to stay safe online
Mac-world news and updates

Thank you!

You’ll love exploring your Mac with us.

Oops, something went wrong.

Try again or reload a page.

Here’s another sign you need to upgrade your macOS ASAP:

30% off your MacKeeper subscription

Сopy the code now and use it in the MacKeeper checkout after the upgrade.

Copy Code

Please be aware that this code cannot be combined with any other discounts, offers, or promotions.


MacKeeper - your all-in-one solution for more space and maximum security.

Try Now


You’ve just unlocked
1 Free Mac Cleanup
  • Delete unnecessary system files and caches
  • Free up GBs of storage space
  • Easily find and delete duplicate files
Start Your Fix Now

Great! MacKeeper downloaded.

Now let’s install it on your Mac.

Here’s your download. Just click it to get started!

1. Open

Click above to open the MacKeeper file from your Downloads

first install step

2. Install

Select Continue to begin the installation

second install step

3. Complete

Hit Install to complete the installation

third install step

4. Enjoy

MacKeeper is all set to optimize your Mac

fourth install step