I am currently running on osx 10.8.5 i need ox 10.9. where do i get update?

Mavericks is a free upgrade at the App Store. Go to the App Store, sign in with your Apple ID and look for Mavericks in the Purchases section. It will be free.

OT

As OT said - it is the first free MacOs X upgrade ever, and here is a guide how to upgrade:

http://www.apple.com/uk/osx/how-to-upgrade/

But check, if your mac is compatible: View compatible Mac models

-- Léonie

Go to the App Store and Type in the Search Box, Mavericks then download it. Make sure you have a account for App Store, If you don't, Creat one. You can creat one online or on the App Store