Paste it into the Get Info (Properties) window, not the folder itself.
Windows method isn't much better, with that miniscule non-resizable horizontally-scrolling icon picker that doesn't scroll with the scroll wheel, so you have to click the scrollbar arrows like a caveman. I like to use the briefcase folder icon for my Projects folder (I think it's located inside C:\Windows\system32\imageres.dll).
Windows method isn't much better, with that miniscule non-resizable horizontally-scrolling icon picker that doesn't scroll with the scroll wheel, so you have to click the scrollbar arrows like a caveman. I like to use the briefcase folder icon for my Projects folder (I think it's located inside C:\Windows\system32\imageres.dll).