wait doesn't work on macOS

[kbrgl]

wait doesn't seem to work on macOS. With an image file opened in Preview, the Promise fulfills only when the app is quit using Cmd+Q, and not when the window with the image is closed.

To reproduce:

opn("image.png").then(() => {
  // Won't run until Preview.app is quit with Cmd+Q
  console.log("Image viewer closed.")
}

I'm running opn on Electron.

[sindresorhus]

From the docs:

Wait for the opened app to exit before fulfilling the promise.

As far as I know, there's no way to wait for a window of the app to close.

[starpit]

interesting. the oddity here is that if i specify wait:true, then opn never resolves, because it cannot observe window closure; but if i specify wait:false, then opn resolves before the open actually finishes, thus resulting in the desired open possibly not occurring, as the process may exit before opn has time to complete the requested opening.

on maOS, doesn't open, without the -W flag, return immediately upon completion? thus, it seems like opn should at least wait for open to return, before resolving...