
Improves the reliability of accessing files located on an SMB server. This update: Improves the reliability of VPN connections that use USB smart cards for authentication. It improves the stability, compatibility, and security of your Mac. No matter the method described below, you will have to download the OS X 10.9 Mavericks setup file from the App Store to create the bootable USB drive. The OS X Mavericks 10.9.5 update is recommended for all Mavericks users.
OS X MAVERICKS DOWNLOAD BOOTABLE USB INSTALL
Now that Apple has released OS X 10.9 Mavericks, you might want to consider creating a USB install drive for clean installs and future use.
OS X MAVERICKS DOWNLOAD BOOTABLE USB HOW TO

I have, in my purchased tab, OSX Mavericks.Please verify it is there before proceeding any further. You will then have an app called Install OS X Mavericks in your Applications folder. When the download completes, do not carry on with the install. Here's how to create a bootable OS X Mavericks install drive: Step 1: Download the OS X Mavericks installer from the App Store, but don't run the installer yet. You can either search for it in the app or access its respective location using this link. No matter the method described below, you will have to download the OS X 10.9 Mavericks setup file from the App Store to create the bootable USB drive.
