MacBook Air Messages app unable to send messages

Hi everyone,

I recently bought a used/refurbished Macbook Air 2017 running macOS 12.7.6 Monterey. I created a new Apple ID to log into the device, and it logs in just fine.

However, I am unable to send messages using the Macbook's Messages app. When I try to send a message to my brother's iPhone, using either his phone number or is icloud.com email address, it shows his name in red, and I can't send anything. (Screen shot attached)

Is there a problem with my account? Is my Macbook on some sort of banned list? What am I doing wrong?

Many thanks in advance for any help!

Posted on Sep 17, 2026 1:21 PM

1 reply

brbo

Level 8 (45,179 points)

Sep 18, 2026 6:22 PM in response to PrismFlyer

Re: "MacBook Air Messages app unable to send messages"

You may want to check how to : Set up Messages on Mac - Apple Support

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If needed:

See whether Apple Support's online article (link below) can help you to trouble-shoot: See what to do: If you can't send or receive messages using Messages on Mac

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Apple Support provides a Messages Support website:

(info. / support / contact options etc.)

Messages for iPhone, iPad, Apple Watch, and Mac - Official Apple Support

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Useful resource for macOS Monterey:

Messages User Guide for Mac - Apple Support