You have files in your home folder that are locked and/or have wrong permissions. First you need to unlock them.
Back up all data if you haven’t already done so. Before proceeding, you must be sure you can restore your system to the state it’s in now.
Launch the Terminal application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ If you’re running OS X 10.7 or later, open LaunchPad. Click Utilities, then Terminal in the page that opens.
Drag or copy — do not type — the following line into the Terminal window, then press return:
sudo chflags -R nouchg,nouappnd ~
You'll be prompted for your login password, which won't be displayed when you type it. You may get a one-time warning not to screw up. You don't need to post the warning. If you don’t have a login password, you’ll need to set one before you can run the command.
The command may take a noticeable amount of time to run. Wait for a new line ending in a dollar sign (“$”) to appear.
The procedure below will reset the permissions of a home folder in OS X 10.7.4 or later. If you're running an earlier version of 10.7, update to the current version first. This procedure should not be used in OS X versions older than 10.7.4.
Back up all data.
Step 1
Click the Finder icon in the Dock. A Finder window will open.
Step 2
Press the following key combinations, in the order given:
Command-3
Shift-command-H
Command-I
The Info window of your home folder will open.
Step 3
Click the lock icon in the lower right corner and authenticate with the name and login password of an administrator on the system. If you have only one user account, you are the administrator.
Step 4
In the Sharing & Permissions section of the window, verify that you have "Read & Write"privileges. If not, use the "+" and "-" buttons in the lower left corner to make the necessary changes.
Step 5
By default, the groups "staff" and "everyone" have "Read Only" privileges. With those settings, the files at the top level of your home folder will be readable by other local users. You can change the privileges to "No Access" if you wish, but then your Public and Drop Box folders will be inaccessible to others, and Personal Web Sharing won't work. Most likely, you don't need to change these settings.
Step 6
If there are entries in the Sharing & Permissions list for users or groups besides "me," "staff," and "everyone," delete them.
Step 7
Click the gear icon at the bottom of the Info window and select Apply to enclosed items... from the drop-down menu. Confirm. The operation may take several minutes to complete. When it does, close the Info window.