Right-click the desired portion of the PDF, choose the “Selection” tab, and choose File → Open in Preview. You can also do this using the Preview app. To split the PDF, hold down the Option/Alt key while dragging the selection toward the “Selection” tab of Preview, or right-click on the selection and choose “Split” or “Split Selection” from the contextual menu. How to Extract Pages from a PDF file on a Mac, PDF Reader on Mac Step 1: Download Preview (Acrobat might work too.) Step 2: Open up Preview and go to File → Save as…“ followed by “PDF” as the template. Make sure to select Acrobat PDF as the PDF reader on the next screen.