Old iPhone 4 with iMessgaes
I have an old iPhone for with IOS7. I want the old iMessages on this phone. However I can't back them up or sync them. This phone is from 2014 and was turned off and never used again, its on it's last legs and won't let me change any of the settings.
I want the iMessages to go on my iMac. How can I get this to work? do I need to buy a third party app?
iMac 21.5″, macOS 10.15