How can I show seconds on macOS BigSur's menu bar clock?
Solution 1:
The display of seconds in the menu bar can be enabled in System Preferences. The specific panel is different depending on the macOS version but you can find it by entering „Seconds“ (in whatever language your Mac is set to) in the search field at top right of the System Preferences window.
Solution 2:
On macOS Big Sur, go to System Preferences > Dock & Menu Bar > Clock and check "Display the time with seconds".
Solution 3:
On macOS older than Big Sur, the System preferences can be configured to show seconds on the menu bar clock:
Apple has changed up the menu bar on Big Sur specifically and people have opinions about that for certain. There is no seconds display that’s easily enabled on 11.3 and below.
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