First of all, Merry Christmas! 😉 … and sorry that you had to start this special day with build problems!
Let’s see if I can help you:
Which project did you try to build – does this error also happen with a New Empty V-Play 2 project (created with the “New Project” wizard in Qt Creator)?
Are you using the latest OSX and V-Play version or maybe an older one? (I currently use V-Play 2.6.2 on Yosemite and El Capitan – never had that error)