I have contacted technical support at least six different times about this issue. My Mac does support the Message+ App. I am getting the error message when I enter the PIN into the App. Verizon officials say that Message+ is not compatible with Mac OS.
Hello, Hoff89. We'd be more than happy to asisst you with this issue. You should have received a Private Note from us. Please reply there, so we can start looking further into this issue with you.