My imessage and facetime will not work correctly

A few days ago my iMessage suddenly wasn't working properly on my mac. I could not receive messages, and when I tried to sent messages, he says not delivered. Then I reinstalled the OS X IS captain.

Then when I type a contact to send an iMessage from my mac, it turns red and said "message could not be sent, contact is not registered with iMessage. I am very sure that the contacts I want to send messages using iMessage.

I tried all the methods on the internet or the apple support, I contacted before, as sign and disconnect my apple on iMessage ID, or restart and set a safe mode, or remove the com.apple.ichat.plist and relaunch the app iMessage. All methods do not work. My iMessage application still have the problem.

Furthermore, I signed in my own apple on my friend's mac ID and test, iMessage work perfectly. So I'm very sure that the problems come from my mac, not my ID apple or something else.

who can help me?

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Please take each of the following steps that you have not already tried it. Stop when the problem is resolved.

1. open the Messages preferences window, then select the tab accounts. On the left is a list of e-mail accounts that you have defined. Select iMessage. Make sure that the shown Apple ID is valid. If this is the case, check the box marked

Activate this account

If it is not already done.

2. disconnect iMessage on all your devices and reconnect. If you have activated the two-step verification for the Apple ID you use with iMessage, you must generate a password specific to the application and enter when you are prompted. Test.

Note: iMessage and iCloud are not the same, even if you use the same Apple ID for both. You need to disconnect from the iMessage, not iCloud.

3. take this step if you have an iPhone the same Apple ID in Mac-related.

Follow the support article, under the heading

Set up SMS and MMS with continuity

If the text transfer is already activated on the phone, turn it off, then turn it back on.

Quit and restart the application Messages on Mac.

Credit for this observation to members of ASC Apple lawyer.

4. it may be a problem with the Apple ID account, even if it works on another device.

Click on the help link at the top of this page to schedule a call of Support from Apple. You might not be charged for the call if you select "Apple ID" - not the model of equipment - as the product you request in connection.

Tags: Notebooks

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