Does anyone have any wisdom on this subject matter?
Generally if nobody replies, it's because nobody knows or has
anything to say on the subject. However:
Begin forwarded message:
Hi:
I get the following alert when dropping a folder of files unto an
NSTextView from the Finder:
"Warning: Do you really want to copy the contents of the
dragged items into the text?"
The Alert has Copy, Cancel and Alias response buttons.
Have you tried comparing your code/the setup of your NSTextView to
the one in TextEdit? (The code for TextEdit is one of the samples
in /Developer/Examples/AppKit.)
TextEdit plainly doesn't exhibit this behaviour (at least, not on my
system), so there is something about your particular program that is
triggering it I think.