OP:
Something tells me you didn't get things set up correctly "from the beginning".
First, you need to answer a few questions.
When you first got this mac...
- did you set up a "new" account first...
and then...
- connect your backup and try to use migration assistant?
If you did it that way, well, that's the WRONG way.
REASON WHY:
Because even if you used the same username and password (as on your old Mac), when you create a "new" account and THEN try to migrate data, the new Mac will "think" the data that is being migrated is still associated with your OLD account on the OLD Mac.
Hence, "permissions problems"...
More questions:
Tell us what your OLD Mac is?
Tell us what your NEW Mac is?
Tell us if you kept a backup drive?
If you do have a backup drive, what app did you use?
(time machine, carboncopycloner, superduper, etc.)
Having said all this, WE CAN GET YOU FIXED UP.
But you must be willing to "take instruction", and then do what is requested.
Very briefly:
- Put the new Mac aside. Go to the old Mac and run your backup again on an external drive.
- Put external drive aside for the moment.
- Go to the NEW Mac, and use the "erase all content and settings" option (we'll tell you how to do that). This will "wipe" the NEW Mac back to an "out of the box" condition
- NOW connect the backup drive
- Begin setup (just as you did the FIRST TIME you took it out of the box)
- When setup assistant asks if you wish to migrate, YES you do.
- "Point the way" for SA to see the backup
- Give SA time to digest everything
- SA will present you with a list of stuff to migrate (accounts, apps, settings, data).
- I suggest you "migrate everything", and let setup assistant do its thing.
- When done, you should see your login screen, just as before...
Another way to do it:
Take your new Mac AND your backup drive to a brick n mortar Apple store genius bar (you have to make appt online).
They will help you do the migration.