Greg's suggestion may be appropriate for your needs for a few~several images. I'm not clear on what a "screenshot of the end slide" references exactly. The "end" slide is just one image from the project? You make a reference to multiple slides the sentence before.
The approach below assumes there are lots of slides You wish to isolate from your Hype project and that they are on an animated timeline(s).
You can export your Hype project as a PNG sequence:
In the Hype Menu Bar: "File" menu > "Export as Movie" > "PNG Sequence...".
This sequence will be based on what is occurring~animating on timelines. Animations that require clicking on a button, or other triggers of this sort, will not show up in the PNG sequence.
Once Hype exports your PNG sequence You can look through the sequence to select exactly the images You want.
You can then convert the selected PNG files to PDF or JPEG format using the Mac's "Preview" application.
More info on Hype's "Export as Movie" feature: