TL;DR
To fix WindowServer Mac high CPU usage, follow these steps:
- Close unnecessary programs, declutter your desktop, and restart your Mac.
- Remove extra desktops, disconnect gaming accessories, and delete the cache.
- Go to System Settings > Accessibility > Display. Toggle off Reduce motion and Reduce transparency.
- Go to System Settings > Desktop & Dock and toggle off Displays have separate Spaces.
- Go to System Settings > Displays > Night Shift, set the Schedule to Off, and click Done to disable Night Shift.
- Update your Mac apps and uninstall the corrupt ones. Also, update your macOS.
- Reset the SMC to fix issues related to display management and CPU usage.
High CPU usage on your Mac due to the WindowServer process can slow down your system and hinder performance. I’ve personally faced the frustration of WindowServer high CPU usage but it is a fixable problem. So, in this guide, I’ll share tried-and-true methods I’ve used to tackle this issue effectively.
Before We Begin
Your Mac uses excessive CPU if your startup disk is full. Download MacKeeper and use its Safe Cleanup to delete junk files, declutter your Mac, and optimize its performance.
What Is WindowServer on Mac?
WindowServer is a key part of Mac’s system, handling the graphics you see and inputs like keyboard and mouse actions. It communicates with other system processes to ensure the user interface operates smoothly.
It’s always running in the background and normally doesn’t use too much power, but if it starts using a lot of CPU, there might be a problem that needs checking out.
Since WindowServer is a core process of the macOS system, it constantly runs in the background. It typically doesn’t consume excessive system resources and high CPU usage attributed to WindowServer is often a symptom of an underlying issue.
How to Find Out If WindowServer Is Using Excessive CPU Cycles
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To check the CPU usage of WindowServer on your Mac, you can use the built-in Activity Monitor app. Here are the steps to follow:
- Open Finder > Applications > Utilities.
- Double-click the Utilities folder and launch Activity Monitor.
- Alternatively, you can use Spotlight to search for Activity Monitor.
- In the Activity Monitor app, select the CPU tab to see a list of processes currently running on your Mac, sorted by CPU usage.
- Find WindowServer in the list. You can use the search field at the top-right of the Activity Monitor window to find it quickly.