How do I turn iMessages off in OS X? How do I turn iMessages off on my MacBook? I have tried to go to settings but those were in the old version! I don't know how to turn it off in the new version.
As mentioned in one of the comments already, within Messages go to Preferences &gt; Accounts and highlight the iMessage account.  There either untick the box for Enable this account or sign out of iMessage, which will effectively disable the account.