The NIB file was opened in XCode 10.3, modified, and saved. The settings for it...

The NIB file was opened in XCode 10.3, modified, and saved.  The settings for it were "opens in Latest Xcode (10.0)" and "builds for macOS 10.6 and Later" so this modified version probably won't open in earlier versions of Xcode.  The changes made to the main menu were:  changed Angband to Hengband in menu strings, changed "Edit Font" to "Choose Font..." since the latter seemed to better indicate what the item does, folded the "Animation speed" menu into the "Settings" menu and renamed it "Frame Rate", changed the entries in that menu to use "per second" rather than "fps", changed the first entry in the "Frame Rate" menu to be "Unlimited (no animation)" rather than "Infinite (no animation)", and added a "Toggle Sound" entry in the Settings menu which targets a new action on the AppDelegate.