There have been posts on the Snagit as a printer option for Mac that dates back 7 years. This function obviously has not been implemented to date. I have upgraded to Snagit 2020 and have experienced this problem where the pdf will not allow Snagit to scroll capture. I have experienced this from multiple applications where the link on the web page displays a pdf. I have tried multiple work arounds, all of which have proved painful. I have seen enough posts on this I would have thought development would have addressed this issue.