I am following the instructions for downloading the files to my Kindle books that I purchased. I'm in the Amazon Manage Your Content. I select the book, then I select More Actions, then Download and Transfer via USB. This is supposed to take me to a screen where I can choose where to save the file. Yet, all I get is a message that says "Success! Download your Kindle content to your computer via Your Media Library." but I can't find the file anywhere on the computer. There is nothing in my downloads folder from today. I tried searching in Spotlight and Folder for *.azw3 and nothing showed up except for the text document I was writing to document my search. I tried looking for Media Library and couldn't find that either. I have several folders called Music, and it's not in any of them. So I tried to download the book again, got the same message and still can't find this file, if it even downloaded. Is this because I'm on a Mac, should I be using a different OS to download this book? Today is the last day to download these files before Amazon changes their policy tomorrow.