How do I access workspaces by number on macOS Sierra?
You can access different spaces in Sierra with control + number keys. But first, you must enable it in the Keyboard shortcut settings:


Go to Keyboard Settings (System Preferences &gt; Keyboard &gt; Shortcuts)
Select Mission Control from the left column of choices. 
Check these boxes: Switch to Desktop 1, Switch to Desktop 1


You can now use switch between spaces using short keys.