Pasting links don't always turn into clickable URLs. For example, if I copy paste a link from Safari's address bar and paste it into a text cell, then yes, it does work. The URL turns into a clickable one. However, the URLs don't seem to turn into clickable when
you simply type in a URL into a text cell
when you type a URL into a text editor (e.g. Sublime Text) and then copy/paste it into a text cell
when you copy paste a URL from another app (e.g. I use ReadKit for RSS feeds, when I right click a URL and select "Copy Link" from the context menu, pasting it into a text cell does not turn it into clickable link)
From @pentool:
Pasting links don't always turn into clickable URLs. For example, if I copy paste a link from Safari's address bar and paste it into a text cell, then yes, it does work. The URL turns into a clickable one. However, the URLs don't seem to turn into clickable when
v3.0b11 Safari 9.0.1 OS X 10.10.5