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I have a 15-inch macbook pro that is mid-2012. The latest version of Mavericks is when the problem started, but it wasn't after the update to it. Just happened one day.

My problem started randomly one day when I tried using iMessage on my mac and all the contacts had turned red. So every time I try to send out a message from my mac, it would immediately say "not delivered."

iMessage works on my iPhone, the only problem is my macbook pro.

I have tried deleting the com.apple.ids.madrid file and that didn't work. I also tried removing my apple ID information from my phone, turning off iMessage on both of the devices, and placing my iPhone 5 in airplane mode for several minutes before turning it on and re-logging in. I can't figure out what the problem is.

I've made sure I'm logged in to my Apple ID, it's nothing like that. I've also tried creating a separate Apple ID just for the purpose of iMessage, but that did no good either.

Please help, it's been weeks and it has become very inconvenient!

marked as duplicate by kenorb, grg Dec 13 '17 at 17:39

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

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Try to use one address (for example e-mail) on all your devises, it worked for me.

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You need to check iCloud settings in System Preferences. Try Account Details to verify your connectivity to iCloud, otherwise try to Sign Out and Sign In again.

To check the iCloud errors while re-trying, run the following command in Terminal:

log stream | grep -i iCloud | grep -C5 -i error

To check for Messages errors while re-sending the message, run:

log stream --predicate 'processImagePath contains "Messages"'

See: iMessage stopped working.. Contacts are shown as red now

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