I dont want to do the magration to my new MC computer

when you first power up your new or newly-installed computer, you are offered a choice:

• create a new Userid

• use the "stuff" at the provided location, and you drop into Migration assistant to migrate. what you choose to migrate can fall into a number of broad categories:

...

there is no reason that you have to transfer some or all of your data to the new Mac. you will NOT be forced to transfer anything.

if that is not what you are asking, please read Writing an effective Apple Support Communities Question and come back with more details.