How long does it take to change name in mass, and what are the steps?

Depends on why you are changing it. If you just got married and you are taking your spouses last name, you can get your DL done same day, new Social Security card and Birth Certificate takes about 6 weeks. If it is due to adoption, name is changed upon judge signing the order. then you have to order new Birth certificate, SS card and DL. Any other reason, you Petition the court for a name change, show cause to the judge why you need it changed, and nce he signs the order, you order all new ID. So depending on what your local court schedile is like, depends on how long it will take.