Personal Group texts?

[fhill2]

Hello.
I'm wondering if anyone knows of an app that can personally group text people.

For example,
write a text that consists of,

'Hello [first name of contact], how are you?'

If anyone knows of an app that can do this i'd appreciate it very much if you could let me know. It'd be a lifesaver for me.

And also,

Is there any way to be able to write and send texts on my mac and send them to contacts on my phone?

Thanks, Freddie.