Has anyone tried installing iTunes 12.6.5 on Catalina? (From support.apple.com/en-us/HT208079) Modifies a load of system folders so I have a feeling this will either not work or break things.

Why you may ask? We’ve had multiple reports and confirmed ourselves that having a certain app installed means PDFs can no longer be opened in @pdfviewerapp. We believe this is due to it corrupting the file type associations so would like to look at its Info.plist.