No Kies, No problem
Since my purchase of the Galaxy S6, along with everyone else, I'll be looking forward to Samsung Link and Samsung Kies being updated to work with my new phone.
But for now, Samsung has an updated Smart Switch that will allow you to backup your phone to your computer ( PC or MAC ).
The backup just created another folder in your Documents/samsung folder and it's thankfull not a .bak like Moble Trans.......looks very similar to the Kies folder.
Here's the link, if it's allowed: