What Is Window Server On Mac? Expert Guide

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Usually, there is a question What Is Window Server On Mac? So, there is the detailed answer given below. A simple peek at the Activity Monitor on your Mac will display a function called Window Server at the head of the list.

It’s one of the many system functions that your Mac can’t function without. We’ll go through the basics of the Windows Server and also what it does on your Mac in this tutorial. We’ll also go over why the process runs in the background all the time and what to do if it becomes a CPU hog.

What Is Window Server On Mac?

First, here is some information about this topic from the wiki: WindowServer is a group of services responsible for managing windows. Additionally, it is described as a compositing engine that displays application activities on Mac’s screen.

Window Server On Mac

The Mac operating system’s Windows Server component is responsible for delivering the graphical interface of apps on your screen. Other major system graphical user interfaces (GUIs), like the Dock and Menu Bar, are also managed by the Window Server. The Windows Server is responsible for everything that appears on your Mac’s screen.

When you log in to your Mac, macOS launches Window Server automatically. Until you log out or shut down your Mac, the process will remain active in the back, providing the graphical/visual interface of all applications. Aside from enabling graphical support for apps, the Window Server is also used frequently by some background applications that do not have a user-facing interface.

Is Window Server A Secure Program?

Window Server is a completely safe system process on the Mac. If anything, it aids the proper operation of apps and other system operations. Window Server should only be a concern if it overburdens the Processor, causes fan noise, or affects the performance of your Mac.

If you see Window Server utilizing a lot of CPU resources inside the Activity Monitor, you might be compelled to force-quit it, but you shouldn’t. This procedure must be playing in the background if you want to utilize your Mac.

Force-quitting all open programs will be closed, the operating system will be refreshed, and you will be logged out of your Mac By Window Server. When you sign back in, macOS will relaunch Window Server in the background and the cycle will repeat.

That demonstrates how critical the process is to your Mac’s optimal operation. Window Server, although being a safe system operation, can occasionally cause your Mac to fail. We’ll discuss why this happens in the next part, as well as how to reduce Window Server’s high CPU utilization.

What Causes Window Server To Use So Much CPU? (And How to Fix)

The amount of CPU and RAM used by Window Server On Your Mac will, of course, be determined by the number of active applications. High CPU consumption can, however, be caused by the following factors:

You Have An Excessive Number Of Items On Your Desktop

Keep in mind that the Window Server placed everything on your Mac’s display. The more icons, files, folders, and other stuff you have on your computer, the more computing power Window Server needs to keep them there.

Remove unneeded files and icons from your desktop if the Window Server is consuming too much CPU power and there are more than 50 objects on your desktop. Better still; combine them into a single desktop folder.

Windows And Too Many Active Apps

Window Server CPU utilization may also soar if there are too much active apps and windows. Close any windows or applications that aren’t being used.

The Issue Is Caused By A Faulty Program

If Window Server’s CPU consumption skyrockets just when you run a specific app, the software is most likely infected with a bug that causes it to misbehave. Close all current apps and reopen them again at the same time to find the app that’s causing the issue.

Check the Window Server consumption in the Activity Monitor after using a program for at least 3-5 minutes. If a program causes Window Server’s CPU use to spike unnaturally, refresh the app and see if it solves the problem. Otherwise, file a bug complaint with the app’s creator.

Another Potential Culprit Is Your Gaming Mouse

Utilizing a gaming mouse on a Mac causes Window Server on Mac to consume a lot of CPU power, according to some Mac users. Check if disconnecting any gaming accessories from your Mac affects Windows Server CPU use.

Animation And Visual Effects

The Transparency feature in macOS blurs the background of current windows against the background of your desktop picture. While this functionality gives program windows an aesthetic effect and a visual, it may cause the Window Server to waste a lot of CPU power, especially if you have a lot of windows active. Reduce transparency and motion are both checked in System Preferences > Accessibility > Display.

Configuration Of Several Virtual Desktops Or External Monitors

When you utilize an external monitor, the Window Server uses extra CPU and memory. To transfer graphics to many monitors, the operation requires considerably more computing power. If you have many monitors connected to your Mac, try disconnecting one of them to see if Window Server CPU utilization is reduced.

Window Server can be overloaded if you employ numerous virtual desktops or Spaces in Mission Control. Decrease the number of artificial workstations in Mission Control to solve the problem. Uncheck Mission Control in System Preferences > Mission Control. Rearrange Spaces depending on their most recent use. Go to the Mission Control panel and deselect Displays to have individual Spaces if the problem persists.

Can I Force Quit Window Server Mac?

Additionally, you must close any active applications you are not using now. Open the Force-Quit menu by clicking Command + Option + Escape, choose the pointless app, and click Force Quit.

Why Does Window Server Use So Much Memory On Mac?

A common example of how WindowServer uses excessive amounts of CPU and RAM is when a Mac is connected to an external display. If it’s a 4K monitor, the adverse event is more likely to occur. A scaled resolution on a Retina display is another factor that causes many people to discover the problem.


Hopefully, you now understand What Is Window Server On Mac? why it is always running in the background. Use the troubleshooting techniques above to diagnose & fix the problem if Window Server uses excessive computing power on your Mac. If the problem persists, restarting your Mac or restarting its NVRAM will bring the process back to normal.

Frequently Asked Questions

On a Mac, what occurs if you close the Window Server?

Force-quitting all open programs will be closed, the operating system will be refreshed, and you will be logged out of your Mac by Window Server. When you sign back in, macOS will relaunch Window Server in the background and the cycle will repeat.

What is the purpose of the Window Server activity monitor?

A Window Server is an action that ensures that the correct information is displayed in each window, maintains numerous windows in multiple locations on the screen, sometimes overlapping or not, and handles all difficulties relating to drawing data on the screen.

On a Mac, what does Window Server do?

Simply put, it is the macOS program that draws objects on the screen, such as app windows, icons, and web pages. Window Server requires more CPU cycles the more windows you keep open at any given moment.

In Big Sur, what is a Window Server?

It’s also known as a compositing engine, which is in charge of displaying program behavior on Mac’s screen. Window Server is the object that allows you to dynamically view anything whether you’re using an app, browsing the web with your browser, seeing an ad online, or playing a game.

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