![]() You should still be able to move the pointer about, but all windows are unresponsive, and your Mac is out of your control. Without WindowServer, there can be no GUI, and no handling of clicks/taps.Īs you might then expect, when WindowServer and the GPU crash, everything on your Mac’s display freezes, including the clock. It’s responsible for working out where on the display you have clicked or tapped, thus which window will receive that event to process, and despatches that event to the appropriate app. Part of Core Graphics, WindowServer gathers in images of each of the windows in the system, assembles them into the composite image which will appear on the display, and passes that onto the GPU and display system. The key feature here is WindowServer, a central part of macOS, which is fundamental to its GUI. This article attempts to explain what to look for, and how to respond. You’re probably familiar with most types of ‘crash’, from uexpected quitting of apps through kernel panics, but would you recognise a WindowServer crash? They range in severity, sometimes just freezing the display for a few seconds, but at their worst can result in unique behaviour – something I experienced for the first time a couple of days ago.
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