Try these steps first

After trying each step below, try to send a message again.

Mac users can check the same by navigating to Messages → Preferences → Select iMessage tab. Ensure that both the accounts used on the Mac and iOS devices are the same. If not, iMessage will not be able to work on Mac. Set Date and Time to Automatic on Mac. On Mac, open the Messages app; it will be in your Applications folder.

Page 4 Introduction Page 5 System Startup BootROM EFI. Initialization Address Space Layout Randomization (ASLR) Compressed Memory Power Efficiency. App Nap Timer Coalescing. Task-Level Scheduling Page 10 Disk Layout Partition Scheme. Core Storage File Systems. Page 13 Process Control Launchd. App Nap helps you save power when you’re working with multiple apps at the same time. OS X can tell when an app is completely hidden behind other windows. And if that app isn’t currently doing something for you — playing music, downloading a file or checking email, for example — App Nap conserves valuable battery life by slowing the app. App nap mac yosemite installer.

• Restart your Mac. Choose Apple menu  > Restart, then click Restart.
• Make sure that your software is up to date. Learn how to update the software on your Mac.
• Make sure that your Mac is connected to the Internet. To check your Internet connection, try loading a page in Safari or another web browser.
• Check that the date and time is set correctly on your Mac.
• Make sure that you enter the correct phone number or email address for the contact.

How To Update Messages App On Mac

If you see ‘This user is not registered with iMessage’

How To Get Messages App On Laptop

Compare mac benchmarks. If you try to send a message and see an alert that the person isn’t registered with iMessage, the message is trying to send using SMS/MMS. Make sure Text Message Forwarding is set up and your iPhone is powered on.

How To Get Rid Of Messages App On Mac

If your contacts see your email instead of your phone number

If you can send messages but your contacts see your email address instead of your phone number, make sure that you're signed in to iMessage with the same Apple ID on all your devices. Learn how to add your phone number to Messages on your Mac.

How To Find Messages App On Mac

Learn more

Get Iphone Messages On Mac

• If you still can't send or receive messages, contact Apple Support.
• Check the Apple System Status page for a temporary outage affecting iMessage or FaceTime.
• Use Messages with your Mac.