Unable to write to my iPhoto library or access iTunes
I am unable to access my iPhoto library. Each time I click on the icon to launch it a message pops up that says "Unable to write to iPhoto library. Check that you have permission to write to the library directory". It was working fine on Saturday and was able to access photos and also move some to a portable hard drive.
For iTunes, it simply states "The iTunes application could not be opened, an unknown error occurred 13014".
I've tried checking system preferences for something as I did have to change my password when I got a notification that someone accessed my Apple ID on Friday and if it wasn't me I should change the password, so I did (after confirming it wasn't spam and did indeed come from Apple). Since then I've had many many issues, but these are the biggest.
Any help would be greatly appreciated!