Make sure the installer is located in the Applications folder. If you've already upgraded, you'll have to download the installer again from the App Store, since it deletes itself after the upgrade. Step 1: Download the OS X Mavericks installer from the App Store, but don't run the installer yet. Here's how to create a bootable OS X Mavericks install drive: With a USB installer, you'll be able to perform a clean installation of Mavericks whenever you want and without having to download it again from the App Store. However, there's a new Apple utility with Mavericks that makes it relatively simple, and thanks to MacForums member, tywebb13, we know how to use it. Walk with us through OS X Mavericks' new Maps appĬreating an OS X USB installer from the App Store download hasn't been very straightforward in the past, and the old methods no longer work for OS X 10.9.5 things to do before upgrading to OS X Mavericks.
