This post worked for me:
Correct AnswerRe: After upgrading to Lion, I can no longer edit my address book. Jul 21, 2011 2:08 PM (in response to decafin8)
If you just upgraded to Lion, you get 90 days of complimentary support, so don't be bashful. Call 'em. I called Apple support and they resolved this specific issue. We first verified that a newly created Admin account could create and edit Address Book. When it did, we rightly assumed corruption in the Address Book Library files.
Here are the steps from that point.
- Back up your Address Book: From Address Book, choose File > Export and choose Export vCard to a desitnation of your choosing.
- Close Address Book.
- From the Desktop, Hold Option and click Go in the menu at the top of the screen.
- Choose Library. If this is not an option, you are not pressing the Option key or you are not an Admin.
- Expand the Application Support folder and drag the AddressBook folder to the Trash. Close window.
- Open Address Book and import your address book vCard.
Lion has changes that remind me of Windows 2000 where folders are hidden even to Admins. Apple is purposefully hiding files and folders they don't think anyone should be seeing. If you want Admin priviledges you had in Leopard or earlier versions, you need to upgrade to a Root user...highly not recommended.