Safari
Safari cannot be opened while it is being updated? What to do?
iPod shuffle (4th Gen)
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Best reply
Go step by step and test.
1. Restart your Mac.
2. Quit Spotlight from Activity Monitor
Finder > Applications > Utilities >Activity Monitor
CPU > All Processes > Spotlight
Select Spotlight and click the Stop button at top left most corner of the window.
Quit Activity Monitor and test.
https://support.apple.com/en-us/HT201464
3. Reinstall macOS from macOS Recovery. https://support.apple.com/en-us/HT204904