what happened to the characters of Britney and Mac on "The Young and the restless"?

Mackenzie moved to New Orleans to live with her dad after J.T. lied about being the father of Brittney's baby because the mob threatened to kill it. When it all came out that this was just a ploy for the mob, Mac was still very angry because she not only didn't care for Brittney, but she also felt left out. She believe that J.T. cared more about Brittney who was only his friend than he did about her who was his girlfriend.

After the mob Killed Bobby, Brittney's parents were moving to New York, and seeing how she was now a widow with a infant son (Joshua after the older brother Bobby never had the pleasure / honor to know), they offered her to come along and she accepted. In real life, she's pursuing her singing career.

Britney move with her parents,since Bobby got killed and Mac is in New Orleans helping the Hurricane Victims..I hope the come back..

After Brittany found out Bobby was hit by a car and killed, she moved to NYC to live with her parents.

Mackenzie is living with her father in New Orleans, that's why Kevin can run the coffee shop - she signed it over to him.

I wish they'd both come back though... Mac especially... (and I'm really excited that Billy is coming back!)

Hope that helps!

There's not much else I can add to what Scotter and Brandi G. have already said, but just wanted to add that not only is Billy coming back, but he is supposed to be the father of Chloe's baby, so it's unlikely that if Mack did come back, they would end up getting together.

Yes, I miss Britney and Mackenzie I wish they would have them come back it would be good for the storyline for the coffee house.

The only thing I wanted to add was that if Mac does come back and Billy is coming back, they wouldn't hook up anyway. I remember them breaking up b/c somehow they are related, but I forgot how.

Add on to Addie's...

Billy is Jill's son. Mackenzie is Jill's brother's daughter making them cousins.

I hated Britney I loved Mackenzie.

Brittany moved to New York to be with her parents after she was informed by the FBI that Bobby had been killed.

Mac I believe is with her father, Brock.

britt went to be with that gangster hubby of hers and mack was pregnant by j t. she will be back when he is a teenager or something