Spotlight problems
Almost always a conflict with another app or with the input source switcher.
System Settings → Keyboard → Keyboard Shortcuts → Spotlight. Confirm Show Spotlight search is ticked and shows ⌘Space.
If you have more than one keyboard input source installed, macOS may assign ⌃Space or ⌘Space to "Select the previous input source". Check Keyboard Shortcuts → Input Sources and clear it if so.
This is the single most common cause, and the symptom is confusing — the shortcut appears correct in Spotlight's own settings while another handler consumes it first.
Alfred, Raycast, LaunchBar and several utilities offer to take ⌘Space during setup, and many people accept without noticing. Check their preferences.
Some people deliberately give ⌘Space to a launcher and move Spotlight to ⌥Space, or the other way round. Both are configurable — Spotlight's in Keyboard Shortcuts, the launcher's in its own settings.
Restart the Spotlight process:
killall Spotlight
It relaunches automatically. If that fails, log out and back in.
⌥Space is a good choice for a second search tool: rarely claimed, easy to reach, and it does not fight the input source switcher. It is the default in Everywhere for exactly that reason.
macOS may assign it to input source switching. Clear it under Keyboard Shortcuts → Input Sources.
Yes — System Settings → Keyboard → Keyboard Shortcuts → Spotlight.
Everywhere keeps track of every file on your Mac — including the folders Spotlight hides and drives you have unplugged. Free for a day, then $19 once.
Download for Mac