I hope one of these tips fixed iMessage not working on your Mac. Make sure that you turn off the firmware password if your Mac is using it, otherwise, this combination of keys won’t do anything useful! You can release the keys once you hear the startup sound for the second time, or after the Apple logo appears and disappears for the second time. When you turn it on, immediately hold Option + Command + P + R keys at the same for about 20 seconds. To reset NVRAM, shut down your Mac first. NVRAM, or non-volatile random-access memory, stores a small amount of memory which includes certain settings. If a new version is available, click Upgrade Now. Head to System Preferences → Software Update and check for the latest version. Keeping macOS up to date is one of the best ways to ensure you don’t run into any problems with your daily driver apps like Messages, Safari, etc. This will set the time and date automatically.

If it’s already selected, uncheck the box, wait a few seconds, and then select it again. Check which account you’re using on your iPhone or iPad. To check on iOS or iPadOS, head over to Settings → Messages → Send and Receive. If they aren’t the same, Messages will fall out of sync with your iDevice and stop functioning. To sync iMessage properly, you need to make sure that the Apple accounts on your Mac and iOS devices are the same. If your Mac’s iMessage still isn’t working, check out the next tip. Many users across various forums and websites swear by this approach, so we think it’s worth a shot.

You’ll need to unlock it again after some time and enter the password once it asks.Now click File and lock the Keychain login.Head over to Launchpad and click Keychain Access.This is a proven fix for when your Mac’s iMessage stops working on you. Once done, open the browser and visit any website to see if it’s working. Try reconnecting to the internet or restarting the router or Wi-Fi spot. Sometimes, it may show your Mac is connected when in reality there are issues blocking iMessage from working.

Make sure that your Mac is connected to the internet.

Messages on mac not working 10.14.2