osx mavericks update deleted all my files and apps from osx lion after osx mavericks update i lost all my files and apps from osx lion, is there any way to get it back ? 
everything was deleted what was on destop in osx lion, apps, pictures and etc.
I ran into the same thing. Here is what I had to do to get everything back.


I had to create a new dummy account.
While logged into the dummy account I found my old user home folder and renamed it something else.
I then created another user account named my original account name.
I proceeded to delete that account's home folder.
Then I renamed my old user home folder to the name of the newly created account
I logged into the newly made user account.
After that I went to the users folder and make my new account the owner of my home folder (it will still think your old account is the owner).
I applied the ownership to all enclosed items.

You should see all your desktop and documents return.
You may have to log out and back in to have everything come back.



As for your apps. I found a Recovered Items folder in the root Macintosh HD directory. In this folder you should have an applications folder. You can drag your applications back into the Mavericks applications folder. Most of the applications should come over properly. I had to re-activate my MS office for mac. Everything else seemed to work fine.