DragAndDrop (Not working on macOS)

.swift

import SwiftUI
import UniformTypeIdentifiers

struct Square: View {
    let id: String
    let fillColor: Color
    var body: some View {
        Rectangle()
            .fill(fillColor)
            .frame(width: 100, height: 100)
            .onDrag({ NSItemProvider(object: id as NSString) })
    }
}

struct DropSquare: View {
    @State private var fillColor: Color = .gray
    var body: some View {
        Rectangle()
            .fill(fillColor)
            .frame(width: 100, height: 100)
            .onDrop(
                of: [.text],
                delegate: DroppyMcDrop(fillColor: $fillColor)
            )
    }
}

struct DroppyMcDrop: DropDelegate {
    @Binding var fillColor: Color
    func performDrop(info: DropInfo) -> Bool {
        guard info.hasItemsConforming(to: [.text]),
              let itemProvider = info.itemProviders(for: [.text]).first else {
            return false
        }

        _ = itemProvider.loadObject(ofClass: String.self) { item, error in
            guard error == nil else {
                print(error!)
                return
            }
            print(item)
        }
        return true
    }
}

struct DragAndDrop: View {
    var body: some View {
        VStack {
            HStack {
                VStack {
                    Square(id: "red", fillColor: .red)
                    Square(id: "blue", fillColor: .blue)
                }
                VStack {
                    Square(id: "green", fillColor: .green)
                    Square(id: "yellow", fillColor: .yellow)
                }
            }
            HStack {
                VStack {
                    DropSquare()
                    DropSquare()
                }
                VStack {
                    DropSquare()
                    DropSquare()
                }
            }
        }
        .frame(maxWidth: .infinity, maxHeight: .infinity)
    }
}

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        DragAndDrop()
    }
}