No I am not asking for an illegal way to install ML on my machine. I bought an iMac with Mavericks preinstalled. The thing is that I don't like Mavericks and ML 10.8.5 was almost perfect. The system was much faster ( finder and animation specifically ) and most of the features in Mavericks aren't needed. It's not possible for me to do a clean boot or recovery as it's gonna install 10.9 back. Is it possible to use the license of Mavericks on ML ? What to do ? I really don't want to pay for that thing.