Change SwiftUI ProgressView Color - macOS not iOS

As of iOS 15 it seems like your code works:

struct ContentView: View {
    var body: some View {
        ProgressView()
            .progressViewStyle(CircularProgressViewStyle(tint: Color.white))
            .padding()
            .background(.black)
    }
}

Note that .tint(Color.white) also works, but the deprecated .accentColor(Color.white) does not.

I'm pretty sure back in iOS 14 progressViewStyle had no effect on indeterminate spinners, so for a more backwards-compatible version try something like this:

struct ContentView: View {
    var body: some View {
        ProgressView()
            .colorInvert() /// make the spinner a semi-opaque white
            .brightness(1) /// ramp up the brightness
            .padding()
            .background(.black)
    }
}