This is a very unstable product and i am not sure how they can launch such a product with all these issues where files get overwritten. I have installed it on my mac, however I have lost a number of files. I created a PDF of a microsoft excel file and next I knew the excel file disappeared. Then again I created a new version of a word file as I updated it and this new file got created, however none of my updates got saved in the new file. I have been using word and excel and I have never ever had such issues. The rebate form asks for a stamp that is supposedly inside the box which really isnt there. I have also read other reviews on this site regarding rebates.