Messages app on Mac syncing text messages but not iMessages I am encountering problems syncing iMessages with my Mac. I can send and receive text messages and iMessages on my iPhone. I cannot send and receive iMessages on my Macbook, but I can send and receive text messages on my Macbook.

My Messages app on Mac was working perfectly until I deleted items in my Keychain. I repaired and verified my Keychain afterwards, too. I did do a hard restart and removed all my accounts on my Mac and added them back. I also deleted my iCloud account and re-added it.

I have also disabled iMessages on my iPhone, then re-enabled it. Also de-paired and re-paired my iPhone and Macbook connection for iMessages. I still get the same behavior. 

Does anyone have any idea what to do? I have googled and tried everything...

Anytime I send an iMessage through the Messages app, I get the "not delivered!" notice. Is there an error log I can check for iMessages that might give me hints? 

Thanks.
The messages app on the Mac has it's own preferences. Check if you're iMessage account is set up there and has a password set – perhaps you deleted it through keychain. If that doesn't help remove it with the minus and re-add the account.