If you have problems searching for items on your Mac, rebuilding the Spotlight Index can help.
Use these steps to manually rebuild the Spotlight index for a folder or disk.
- 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. Click OK to confirm.
- Select the folder or disk 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.
Above information is available here > Rebuild the Spotlight index on your Mac - Apple Support
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