Understand "Open in browser" vs "Open in Preview" for PDF files
Something that I have found quite useful is getting info for one type of file and then setting it so that all files of that kind open in a specific application.


  • Right click (or control + click) on any PDF file and choose Get Info from the pop-up menu.
  • In the window that pops up, choose which application to open that file with. (choose Preview if you want to open PDF files in Preview).  
  • Click Change All… to automatically open all PDF files in the selected application.