What is WindowManager on Mac?
By Junaid, maker of Taskglass · Last reviewed
Powers Stage Manager and related window-management features.
WindowManager is the macOS process behind Stage Manager, which groups your windows and shows recent apps along the side of the screen, along with related window-handling features. It runs even when Stage Manager is off, and is usually light.
- Category
- macOS system
- Made by
- Apple
- Safe to quit:
- With care
Shown in Activity Monitor as WindowManager
Why is WindowManager using so much CPU or memory?
- Stage Manager in use with many apps and windows
- Window animations or a glitch after changing displays
What to do
- 1Turn Stage Manager off in Control Center to compare
- 2Force quit WindowManager; macOS relaunches it
- 3Restart your Mac
Safe to quit? With care.
It relaunches automatically; window arrangements may briefly reset.
Related processes
Part of the Taskglass Process Library