You'll find this option in System Preferences > Accessibility > Display, and it's been known to reduce WindowSever CPU usage, particularly on older Macs. First, check our article about speeding up a slow Mac, in particular the section about reducing transparency. If WindowServer keeps using up a lot of power even when you don't have much of anything running, there are still a few things you can try. ![]() Related: 10 Quick Ways to Speed Up a Slow Mac You might have found a problem they can fix. To do so: Click on the Apple icon present in the Menu bar and select System Preferences. If you notice this pattern, and don't think the application should be causing that big a spike in WindowServer CPU usage, consider contacting the developer. Having said that, sometimes a bug in a piece of software can cause excessive WindowServer CPU usage. So it makes sense for games, video editors, and other constantly refreshing applications to cause a spike in WindowServer CPU usage. To some extent, this is normal: programs that constantly change what's showing on the screen are going to use WindowServer quite a bit, which means they will use up CPU power. If you see a particularly large drop after closing a specific program, that program is probably responsible for the high CPU usage. If WindowServer is taking up a lot of CPU power, try closing applications and seeing if the usage drops. Status Monitor of KX driver pop-up a message box for toner low and toner empty message (5.0.69.29). Why Is WindowServer Using So Much CPU?Īs we've said, every application communicates with WindowServer in order to draw things on your display. You can read more at Apple's developer guide if you're technically inclined, but it's not exactly light reading.įor the most part, just know that WindowServer is what macOS, and every application you run on it, uses in order to display things on your screen. This appears to cause some system slowdown under load and reduce battery life. ![]() When moving the mouse cursor it jumps to 30-50 CPU time. ![]() Every window you open, every website you browse, every game you play-WindowServer "draws" it all on your screen. The 'WindowServer' process uses excessive CPU time on my 2020 M1 MacBook Pro running Big Sur 11.2.1. If you see something on your Mac's display, WindowServer put it there. WindowServer is a core part of macOS, and a liaison of sorts between your applications and your display. This article is part of our ongoing series explaining various processes found in Activity Monitor, like kernel_task, hidd, mdsworker, installd, and many others. Don’t know what those services are? Better start reading! Related: What Is This Process and Why Is It Running on My Mac?
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