Don't know where to put this so here goes. I had my mac mini registered with my daughters Amazon account for about 6-8 months to check out ebooks to see if it was something I wanted to get into. Didn't like reading on my mac mini and bought an iPad 2 for reading among other reasons and have now have a Kindle Touch on pre-order. I love ebooks. I decided to de-register my mac mini and re-register to my Amazon account. I also downloaded Calibre. My mac mini is running OS 10.5.8 which seems to be too old for the Kindle app on Apple. Anyway so far I have not figured out how to re-register my mac mini to my Amazon account and will not do the same with my iPad 2 until I'm sure I can get both registered to my Amazon account. I need some simple steps to help me get it on my Amazon account, thanks. I'm so not tech savvy.