I used to get my iPhone messages on my iMac at the same time I got them on my iPhone. Lately I don't see them on the iMac. What do I need to do to solve this? Thanks advance.
Doc
To enable "Text Message Forwarding", both (all) devices must be signed into the same iCloud account and connected to the same WiFi network. You set the SMS Message Forwarding from your iPhone:
You must be running Yosemite (10.10) or higher on your Mac, and iOS 8.1 on your iOS devices. And one of the iOS devices MUST be an iPhone (running iOS 8.1 or higher).
1. Make sure both (all) devices are signed into
the same iCloud account.
2. Make sure both (all) devices are on
the same WiFi network.
3. Make sure both (all) devices have the iCloud account checked (active) in the Send & Receive setting.
4. Go to Settings > Messages
5. Tap Text Message Forwarding
6. Turn on forwarding for the computers/tablets that you want to use.
7. Each computer/tablet will get a popup with a 6 digit code.
8. Enter that code on your iPhone to activate the Text Message Forwarding on that computer/tablet.