![]() The process is normally dormant and uses very little CPU, but can occasionally spike to high CPU usage when drawing or redrawing windows or when under heavy system load. Why does WindowServer cause high CPU usage? While it is true that WindowServer is a critical part of the macOS graphical user interface (GUI), it is also true that it is a very stable and well-tested system component. Some Mac users have been concerned about a recent string of malware attacks that have targeted the WindowServer process. Keep reading if you're interested in learning more about WindowServer and how it works. ![]() ![]() It is constantly evolving to meet the needs of macOS and its users. OpenGL is the industry standard for 3D graphics. Cocoa is Apple's native application development environment, and Quartz is the 2D graphics API. It also provides low-level support for Cocoa, Quartz, and OpenGL applications. WindowServer is constantly running in the background, and its main purpose is to coordinate the windows and controls that make up the GUI. In other words, it's responsible for everything you see on your screen. WindowServer is a core MacOS process responsible for managing the graphical user interface (GUI) for all macOS applications. If you've ever wondered what WindowServer is and what it does on a Mac, you're not alone.
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