How do I map <cmd>-<shift>-f to run Ack plugin in Vim?
Solution 1:
The problem is that within <...> notation mappings, case is (mostly) insensitive, so you have to explicitly state you want to map with the shift key. Try this:
nmap <D-S-F> :Ack<space>
Solution 2:
Or.. you could think about doing it this way:
nmap <D-F> :Ack <space>
You don't need to mention the shift & this still only triggers with a capital F (so although shift isn't mentioned in the binding, you still have to press it).
This works for me at least.