Final answer:
To make a PDF smaller on Mac, use the Preview app's 'Export' feature with the 'Reduce File Size' quartz filter. Be mindful that this may affect image quality. Third-party tools offer more control over the compression.
Step-by-step explanation:
How to Make a PDF Smaller on Mac
To reduce the file size of a PDF on a Mac, you can use the Preview app, which is built into macOS. Open the PDF with Preview by right-clicking (or Ctrl-clicking) the file and choosing 'Open with > Preview'. Once the file is open, select 'File' from the menu bar, then click on 'Export'. In the dialog that appears, click on the 'Quartz Filter' dropdown menu and select 'Reduce File Size'. Choose a file name and destination, and then click 'Save' to create a smaller version of your PDF. Be aware that this may reduce the quality of images and graphics within the PDF. For more control over the quality, you can use third-party applications or online services that specialize in PDF compression.