In the standard File mode, you’ll see preview icons for each PDF.
Here you can set the number of pages which will be split, or you can choose to … Acrobat automatically saves the split files to the target folder.
In the Preview app on your Mac, choose Preview > Preferences, then click Images. After you import the PDF files you need to split, as same as merging PDF files, you can go to the Pages tab and then click on the Split Document button, a window will subsequently display.
