Hi @Anonymous ,

I explained the case of the issue and workarounds here:

https://forums.autodesk.com/t5/autocad-for-mac-forum/solid-black-blocks-printing-on-paper-copies-of-pdfs-created-on/m-p/9917825

and here:

https://forums.autodesk.com/t5/autocad-for-mac-forum/printing-from-mac-preview-and-black-boxes-are-showing-up/m-p/9170035

Try to use Acrobat Reader for printing PDFs, created in AutoCAD or convert PDFs to JPEG images before printing.