...

    session.createStream({
        name: streamName,
        display: localVideo,
        constraints: {video: true, audio: false}
        ...
    }).publish();

Disable resolution constraints normalization in Safari browser

By default, WebSDK normalizes stream publishing resolution constraints set in Safari browser. In this case, if width or height is not set, or equal to 0, then the picture resolution is forced to 320x240 or 640x480. Since WebSDK build 0.5.28.2753.109 (hash 149855cc050bf7512817104fd0104e9cce760ac4), it is possible to disable normalization and pass resolution constarints to the browser as is. for example:

publishStream = session.createStream({
    ...
    disableConstraintsNormalization: true,
    constraints {
        video: {
            width: {ideal: 1024},
            height: {ideal: 768}
        },
        audio: true
    }
}).on(STREAM_STATUS.PUBLISHING, function (publishStream) {
    ...
});
publishStream.publish();

Known issues

1. If the web app is inside an iframe element, publishing of the video stream may fail.

...

b) use external camera supporting resolutions as needed in MacOS Safari

c) disable resolution constraints normalization and set width and height as ideal, see example above.