iMac's smart mailboxes are empty post the Monterey update.
I recently updated my iMac to Monterey 12.7.4 and now all of the contents of the Smart Mailbox folders have disappeared.
[Re-Titled by Moderator]
iMac 27″ 5K, macOS 10.14
Question marked as
Safe Boot, (holding Shift key down at startup), does the problem occur in Safe Mode? Could take 10 minutes.
Safe mode attempts to repair Disks & clears lots of caches & loads safe Drivers, & prevents loading of 3rd party extensions, so if Safe Mode works try again in regular boot.
Sounds like you need to rebuild the Spotlight Index...
How to rebuild the Spotlight index on your Mac
If searching your Mac doesn’t return expected results, rebuilding the Spotlight index might help.
Choose Apple menu () > System Preferences, then click Spotlight.
Click the Privacy tab.
Drag the folder or disk that you want to index again to the list of locations that Spotlight is prevented from searching. Or click the Add (+) button and select the folder or disk to add.
To add an item to the Privacy tab, you must have ownership permissions for that item. To learn about permissions, choose Help from the Finder menu bar, then search for “permissions.”
From the same list of locations, select the folder or disk that you just added. Then click the Remove (–) button to remove it from the list.
Quit System Preferences. Spotlight will reindex the contents of the folder or disk.