macvim not respecting os/x shortcuts

I have macvim working as expected on my older mac. On a newly minted Mac however, the normal key sequences to select, copy, and paste text: > Shift arrow keys (select) > Command C, Command X, Command V (copy, cut, paste) are not being recognized. Then there must be some settings/configuration required to get the Cut/Copy/Select using OS/X keystrokes to work in macvim? What is/are those settings? thanks!