Spotlight
Preview your results. Click a search result and view it in the preview on the right. Sometimes that’s all you need to do—click items or links directly in the preview. You can also double-click a result to open it.
Open an app. Type the app name in Spotlight, then press Return.
Turn off Spotlight Suggestions. If you want Spotlight to search only for items on your iMac, you can turn off Spotlight Suggestions in Spotlight preferences. Open Use Spotlight on your Mac.