I have three Macs that can't do this.I can do that with the stock OS, if you have a mac, you can use Messages on your mac to send/receive text messages on your phone. I suppose you have to have a compatible mac to be able to do that. I think the "Cut off" is a late 2011 MacBook, not sure about iMac/MacPro. If your mac is NOT compatible, you might be able to "hack" it with Continuity Activation Tool, you can find much info about this on another area of MAcRumors.
A 2001 PowerMac G4.
A 2003 17" PowerBook G4.
And a 2006 17" MacBook Pro (Snow Leopard max)
Remote Messages running on my phone and a Fluid app (PowerPC version) on my Macs makes this as close as possible to the Messages app for me.