When I updated iOS7 to my iphone, it somehow changed my settings on my computer. So now, whenever I text someone off my Macbook Pro, it sends the message from my email address. How do I change that back to send iMessages from my phone number?
Not sure if it's the same for everyone, but the primary issue when you reinstall is that you have to double check that you've logged into "Use your Apple ID" for iMessage on your iPhone, which pushes the phone number option to your computer to sync up.
To do this, go to Settings -> Messages -> Send and Receive and make sure you login and select "Use your Apple ID for iMessages"
Hope this helps!
The solution above isn't working. The iOS7 update somehow removed my phone number form the iMessage settings on my Mac and I no longer have the option to add the phone number. I tried clicking "add email" and entered a phone number but as soon as I hit 'enter' or 'tab', the phone number is removed automatically.