Any program on mac to transfer messages
I'm not sure if this is what you want, but I use iMacsoft iPhone SMS to Mac Transfer to transfer my SMS to Mac as a txt file(.txt file).If you want to learn more about it there's a step by step user guide on How to transfer or backup SMS from iPhone to Mac
Step 1: Connect your iPhone to Mac
Step 2: Click "SMS" icon in the iPhone list. Several minutes later, all messages in iPhone are displayed in the interface.
Step 3: Check and find out the SMS you want to transfer, then click "Export the checked to local" button. Immediately, you can look through all iPhone SMS you transfer as .txt format in the Mac desktop.
That's all.