I reinstalled Mavericks today, from a USB flash drive. This is how I've done it: - I started the Mac while holding the alt key. - Several volumes appeared, I selected the USB flash drive with Mavericks on it - I came in the gray screen where you can use safari, disk utility, terminal or reinstall Mavericks. - I used disk utility to erase my SSD and my HDD. - I then clicked to install Mavericks And now the weird parts: - Mavericks started installing, it went pretty quickly, but got stuck at "less than one second remaining" (seen many people posting about this however) - Eventually it ended and I thought the installation was complete - But no, the Mac restarted itself and the installation started again it seems, this time it said 24 minutes remaining This already happened last time I installed it (the same way). It ran fine except I had some core audio issues / Logic Pro issues, that's why I'm making a fresh install. Perhaps it's unrelated, but reinstalling logic did not help. But anyway that's another topic.