Messages app on my Macbook Pro stopped sending to Android

Text messages from your Mac are actually sent through your iPhone. On your iPhone go to the Settings app → Messages → Text Message Forwarding. You may need to re-do the setup by removing and re-adding your Mac in there.


I fixed this by enabling the following setting on my MacBook:

MacBook > Messages > Preferences > iMessage > Settings > You can be reached for messages at: > Check checkbox next to your phone number

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