Hi Moritz, this type of screenshot does not work on OSX yet, it's something that I will need to fix up.

The other kind of screenshot that generates a viewport image internally and puts it on the clipboard does work on OSX though. If you search here for "renderToClipboard" you can find that one.

The "renderToClipboard" method won't quite work as a drop-in replacement for this particular script though because it generates an image and puts it on the clipboard rather than generating an "image object" which can be saved directly to disk instead as this script is doing.

In the next v3 beta there will be a new .render() method that works similar to .renderToClipboard() in that it generates an image internally instead of just taking a capture of the current display screen and does return an image object that can then be saved to disk in the script, so that one that's coming in the next beta could work as a drop-in replacement instead of the .screenshot() method.

- Michael