Mavericks Mail not Saving Password

Hi All,

I recently purchased a rMBP and since moving to it Mail constantly asks for my Gmail password. My cMBP on Mavericks never did this but this rMBP does. I have read around on Mail plus Gmail related issues but can't find an answer to this. Has anyone else had this issue and does anyone know of a fix?

Thank You for your time.

 

In the end I removed and then added my account back in so far so good.