This is happening on both my Imac and Macbook Air. When I open it, it all just freezes. I am about to sell my Imac I dont want the new user thinking I sold them it dodgy. Please help (I am a new mac user please explain in depth) Thank you
First follow the instructions in this support article.
If the iPhoto library is the source of your desktop pictures, it may need to be rebuilt, or you may need to update the iPhoto application to the latest version.
Otherwise, continue as below.
Back up all data.
In the Finder, hold down the option key and select
Go ▹ Library
from the menu bar. From the Library folder, delete the following item, if it exists:
and move the following item to the Desktop:
Launch System Preferences and test. If you still have the issue, put the item on the Desktop back where it came from and post again. Otherwise, delete the item.
Retrieving data ...