On 22nd October Apple released OS X Mavericks i.e OS X 10.9.Installing it can be a tedious task when not connected to the internet, the OS X Mavericks update is free for everyone so there is no reason holding you back to get it. There is no need to worry if you do not have a stable internet connection because u can update to Mavericks via a USB device also. A minimum of 8 GB free on a USB will be required for this procedure

The procedure on how to install os x mavericks with a usb is fairly simple for people who know how to deal with computers, for those who don’t this article will explain how to. U will be needing a USB of 8 GB capacity, an internet connection to read this guide and to download the Maverick update file from the Mac App Store.Any Mac or MacBook running OS X Snow Leopard or newer is compatible with the Mavericks upgrade

How to install OS X Mavericks Using a USB

Download the OS X the Mavericks from the Mac App Store with a Mac.When a screen pops up telling u to install mavericks, do not continue, except do the following.Connect a suitable USB drive, the USB must be empty otherwise all data will be erased while formatting.Format the USB as Mac OS Extended keeping the name ‘Untitled’Open a Terminal and type the following commandsudo /Applications/Install\ OS\ X\ Mavericks.app/Contents/Resources/createinstallmedia --volume /Volumes/Untitled --applicationpath /Applications/Install\ OS\ X\ Mavericks.app --nointeractionEnter your administrator password.Your bootable OS X Mavericks usb is now made.

You may now update your previous OS X via this USB.

In any case if this procedure failed, you can still try Lion DiskMaker which is now known as DiskMaker X