macOS Sierra Spotlight search does not find Numbers but Number

Solution 1:

I would first do as suggested in Hefewe1zen's answer, rebuild the Spotlight index on your Mac.

If that doesn't fix the issue, then the next thing I'd try is rebuilding the Launch Services Database.

In Terminal:

/S*/L*/F*/C*/F*/L*/S*/lsregister -kill -r -domain local -domain system -domain user

I always use the short form of the command above, however here is the long form:

/System/Library/Frameworks/CoreServices.framework/Frameworks/LaunchServices.framework/Support/lsregister -kill -r -domain local -domain system -domain user

There is no manual page for lsregister however, the following command outputs the internal help file:

/S*/L*/F*/C*/F*/L*/S*/lsregister --help

If you want to read more about rebuilding the Launch Services Database, Google is your friend!

If by chance neither of these suggested answers work, then I'd reinstall Numbers.

Solution 2:

I would start by rebuilding the Spotlight index.

From: How to rebuild the Spotlight index on your Mac

1. Choose Apple menu () > System Preferences, then click Spotlight.
2. Click the Privacy tab.
3. 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.”
4. 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.
5. Quit System Preferences. Spotlight will reindex the contents of the folder or disk.

Or via Terminal:

sudo mdutil -i off /
sudo mdutil -i on /
sudo mdutil -E

See the man page for mdutil or type man mdutil in Terminal.