I created a PDF document using Acrobat 9 Pro which contains 78 individual PDF's. I would like to create another, separate document using only the first 38 PDF's. I know the current Acrobat DC has an "Extract" and "Split" function, however, there doesn't appear to be one in 9 Pro. Also, for some reason the document can
only be opened by Acrobat Pro or Adobe Reader. I use a Mac and Preview should be able to open it, it doesn't.