Save as a PDF and then do this to make it smaller- you don't need to download a utility
Macs are so smart- You can compress a PDF file with Preview, so it's easier to email and archive.
This process compresses the images in the file. The compressed images look the same as the originals when viewed onscreen, but may appear to be of lower quality when printed.
Open Preview, in your Applications folder.
Choose File > Open, and select the PDF file to compress.
Choose File > Save, choose Reduce File Size from the Quartz Filter pop-up menu, and choose a name and location for the new PDF file.
You can save any document as a compressed PDF file.