Can't remove warning about removing files from iCloud desktop The option, "show warning before removing from iCloud Drive" option is missing from the Finder preferences menu. So, each time I try to send something to the trash, the warning pops up.

Any thoughts on why it would be missing, how I can get it back?

OS: 10.11.6 (El Capitan)
Mac Pro Early 2008
Probably because you're running El Capitan. If I'm not mistaken, the feature was added in Sierra.