Your customer states he can receive chats with Messages app on an iPad, but not on his iMac with OS X Mountain Lion installed. How can you help this customer
receive chats with Messages?

A.
Select the iMessage check box in System Preferences > iCloud

B.
Help the customer download Messages from the Mac App Store.

C.
Delete Messages, then boot to OS X Recovery to reinstall OS X Mountain Lion.

D.
I Set Messages preferences for “You can be reached for messages at:” to the same email account as the iPad.