Change a conflicting keyboard shortcut on Mac
It’s possible to have keyboard shortcuts for one app that conflict with another app. For example, Command-Space bar opens the Spotlight menu, but in another app it might be used to switch between different input methods. You can change a keyboard shortcut that conflicts.
Note: Keyboard shortcuts in apps may vary depending on the language and keyboard layout you’re using on your Mac. If shortcuts don’t work as you expect, look in the app menus in the menu bar to see the correct shortcuts. You can also use the Keyboard Viewer to see your current keyboard layout, known as an input source.
On your Mac, choose Apple menu > System settings, then click Keyboard in the sidebar. (You may need to scroll down.)
Click Keyboard Shortcuts on the right. A warning icon appears next to conflicting keyboard shortcuts. Double-click the shortcut, then change it. See Use macOS keyboard shortcuts.