iMessage is not working on my mac.

This worked!! Thank you!!!

worked for me! thank you so much

Thank you! I rely heavily on messages and two days ago it started freezing up....tried deleting plist files for chat and messages, tried rebuilding database, signing out of iTunes, iCloud, etc...tried pretty much everything I could find and nothing worked until I came across this and it worked! Thank you!

This worked for me, the first tip. Thank you!