Symptoms
- Clicking Dock icons does nothing
- Menu bar items don't respond or show outdated information
- Other open apps still work normally despite this
- Dock or menu bar looks visually frozen or glitchy
Likely causes
- CommonThe Dock process becoming temporarily unresponsiveThis is a self-contained system process that can be restarted independently.
- CommonThe SystemUIServer process (which manages the menu bar) getting stuckSimilar to the Dock, this can be reset without a full restart.
- PossibleHigh system memory pressure affecting all interface elementsIf the whole system is under strain, the Dock and menu bar can lag along with everything else.
- PossibleA recently added menu bar app causing a conflictThird-party menu bar utilities occasionally cause instability.
- PossibleA macOS bug specific to certain versionsThese are occasionally reported and fixed in subsequent updates.
What to do
- Open Activity Monitor (Applications > Utilities) and search for 'Dock' in the process list.
- Select the Dock process and click the Force Quit (X) button; it will restart automatically within a second or two.
- If the menu bar is also affected, find and restart 'SystemUIServer' the same way.
- Check if a recently added menu bar app might be causing the issue, and quit or remove it to test.
- Check Activity Monitor's Memory tab for overall memory pressure if the whole system feels sluggish, not just the Dock/menu bar.
- Restart the Mac fully if restarting the Dock and SystemUIServer individually doesn't help.
- Check for macOS updates in case a known bug affecting these interface elements has been fixed.
- If this happens frequently, keep track of what you were doing beforehand to identify a possible triggering app.
Tools and parts
- None required
When to call a pro
This is a simple software fix you can do yourself; professional help isn't needed.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.