osx.xcodeproj is an ordinary Xcode project with an ordinary Xcode target for osxapp, contained in an ordinary Xcode workspace that happens to also reference the gyp-generated platform.xcodeproj. The osxapp target links to and embeds Mapbox.framework, which is a product of the gyp-generated platform.xcodeproj. Moved XIBs into Base.lproj and icons into an asset catalog. Shared an Objective-C exception breakpoint, disabled by default.