Attention to the update for OS X Mavericks!

  Enthusiastic last night about the release of the new version of OS X Mavericks I decided to update my Mac Mini to play a little with the new version of the operating system. Unfortunately, the update deleted a very good part of my data, more precisely several months of data, but there are backups for that. If you intend to update to the latest version of OS X, I recommend that you save your important files before starting, because in the end you might realize that you have less stuff than you imagine.