Not really.
The script provides an additional export recipe “export to collection” which exports in the collection folder and reimport the exported images in the collection.
From lighttable, you can export as many images as you like, while from darkroom you can export one image only with CTRL+E (or the equivalent in Mac).
This is no different from any other export recipe, it’s just how DT works.
After you exported, typically to a 16 bit tiff, you can then launch the editor you choose, one image at a time (as sending multiple images to the same editor has unpredictable results, depending on the specific editor).
The script should give you an error if you try to launch an editor on a raw image.
You can launch editors from lighttable with dropdown list and the buttons “edit” and “edit a copy”, or from inside darkroom, by using keyboard shortcuts you have previously configured for each editor. The latter, is the feature I find more useful.
This is how it works in Windows and Linux. If you notice a different behaviour in Mac, please let me know.