This window is a museum of typography. By default, it shows you smiling piles of poo and airplane emoji. But that’s a trap. Click the window’s top-right corner to expand it. Then, in the left sidebar, scroll down to "Math Symbols."
Suddenly, you are in a forgotten wing of the digital library. Here sits √, flanked by its exotic cousins: the radical with a long vinculum (the horizontal bar) waiting to be combined, the square root of pi, the Latin small letter f with a hook (ƒ). Double-click √, and it appears in your document.
But typing the square root symbol on a Mac is deceptively simple. It is a gateway to a much larger story—one that spans keyboard design philosophy, the hidden power of Unicode, the schism between what you see and what the computer computes, and the rise of visual computing. This is the feature-length story of √ on macOS. Open System Settings on any Mac. Navigate to Keyboard. Look at the virtual representation of the physical device in front of you. Run your finger (or cursor) across the number row. Find the radical. You won’t.
The king. 0.3 seconds. No friction. The Archaeologist’s Way: The Character Viewer But what if you forget the shortcut? Or what if you need √, but also ∛ (cube root) or ∜ (fourth root)? Enter the Character Viewer. Summon it by pressing Control + Command + Space , or by clicking "Edit" in most apps and selecting "Emoji & Symbols."
