About model and data exchange with 3rd party solutions: Revit, Solibri, dRofus, Bluebeam, structural analysis solutions, and IFC, BCF and DXF/DWG-based exchange, etc.
Anybody can suggest a way of bringing in the vectorial data in a PDF (lines, perhaps fills, perhaps text) so that it is editable in Archicad? I am trying an online converter to DWG with so-so results.
As Richard says you can place the pdf as an external drawing reference in AC and explode it PROVIDED the pdf is generated in vector format. If the PDF contains a scanned image there isn't anything you can do in AC to turn that into vector data.
Apple iMac Intel i9 / macOS Sonoma / AC27UKI (most recent builds.. if they work)