There seems to be a difference between the functionality of the Windows and Mac versions of Word 2016 regarding opening PDFs and converting them into an editable Word document.
In the Windows version of Word 2016 a PDF file can be opened and edited without difficulty, with all or almost all formatting, layout and graphics preserved.
However when attempting to open a PDF file in the Mac version of Word 2016 a dialog box first appears giving a number of options of the file type to convert from. These include text, HTML, Excel and other formats, BUT NOT PDF files.
If you attempt to open a PDF using any of the available options either an error message is generated or the file is opened as unintelligible symbols, see below.
I have the same problem regardless of which PDF I use. I have attached a small sample PDF file (or you can download it from https://www.dropbox.com/s/3ni3x45kd0vr4rj/Notice_to_Comply.pdf?dl=0).
It opens without any problems in Win Word 2016 but I cannot open it in the Mac version.
I'm using latest version of Word 2016 (15.11.2) on the latest version of OS X Yosemite (10.10.4).