I updated my macbook pro to OSX Mavericks and signed in to Messages app but it isn't working. My account is enabled but when I try sending a message it says cannot send message. Your iMessage account isn't signed in. Not sure what's causing the problem, any help?
MacOS – Messages not working on macbook pro
macbook promacosmessages
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Best Answer
Have you tried deleting your iCloud account (which includes your iCloud account in the messages app) and re-adding it? There might be a stale config file somewhere that just needs to be re-created. Try either removing/re-adding your entire iCloud account or just unchecking/checking the "Messages" option under your iCloud account in System Preferences.