I'm running OS X 10.7.4 on a 13" MBP that I purchased earlier this year. I recently also picked up an HP N6310 Scanner so that I could scan documents through the automatic document feeder in higher resolution than my all-in-one printer allows (i.e. 600dpi v. 300dpi). To note, I only scan documents for the purpose of either archiving them or emailing them to clients. The problem, however, is that, when I save a document, the resulting pdf file is huge (eg. about 2.5 mb for a one page document). I have tried compressing the file with the app built into my MBP, but it only trims about 10% off of the size of the file. Is there an application I can buy that will allow me to compress pdf files WITHOUT losing any quality? It's important that the quality of the pdf file is not compromised. Thanks.