You can use Apple's Preview application to scan documents, but unless you adjust some settings the final file size may end up being very large. Topher, an avid Mac user for the past 15 years, has ...

However, it’s possible to reduce the size of a PDF with Preview and ColorSync without losing quality. It requires creating a new filter and using that for resizing. Here’s how you do that: ...

How to reduce PDF file size on a Mac computer with Preview. 1. Open the PDF — if Preview isn't your default app, right click the PDF, then select Open with followed by Preview.