cv.imshow not working in Mac

HI:
Thank you binding opencv for node!
I try the code in Mac,but the "cv.imshowWait" don't display the image,just hold the process.
```
(async () => {
const img = await cv.imreadAsync('./faces/qiqi-1.jpg')
console.log(img)
cv.imshowWait('face detection', img);
})()
```