Update README.md

Author: swyxio

README.md

@@ -1986,6 +1986,7 @@ Tools:
 - https://ui.glass/generator/ Get started with this free CSS generator based on the glassmorphism design specifications to quickly design and customize the style properties.
 - https://glass3d.dev/ https://news.ycombinator.com/item?id=44445238
 - frosted glass sticky header https://www.joshwcomeau.com/css/backdrop-filter/
+	- note that [apple has a private css property](https://alastair.is/apple-has-a-private-css-property-to-add-liquid-glass-effects-to-web-content/): `-apple-visual-effect: -apple-system-glass-material`
 - glassy glassmorphism [codepen](https://codepen.io/a-trost/pen/dypQzwq), [in context](https://codepen.io/TurkAysenur/pen/ZEpxeYm)
 
   ```css