" If not, is there a way to setup the computer manually and then use Migration Assistant afterwards to bring over the Apps & Data?"
Yes.
I've done exactly that.
What you need to do the job right is:
- an external drive (can be SSD or HDD)
- cloning software (such as CarbonCopyCloner or SuperDuper)
The idea here is to:
1. create a cloned backup of the old Mac with the old account
2. set up the NEW Mac with a NEW account (and nothing else)
3. connect the cloned backup and migrate things over "by hand" (you need to take care of permissions problems)
I recommend SuperDuper for the cloning job because
- it's free to download and use for this job
and
- it's about the easiest-to-use app you'll find out there
When the new Mac arrives:
Before you take it out of the box, run the cloning job on the old Mac.
Now unbox the NEW Mac and put it on the table.
Connect the cloned backup
Begin setup
Create your NEW account -- just a username and password for now (worry about the other stuff, like your Apple account, later)
Now it's time for a decision:
Do you want to migrate the apps on the backup, or not?
Reason why you should give this thought:
If the Mac you're migrating FROM is pretty old, the apps may be, too.
You could migrate them, and then discover that they either need upgrades or replacements.
It's up to you.
Now, for the "other stuff"...
Before you do anything with the backup, you need to do this to over-ride possible permissions problems:
Click on the icon of the backup ONE time to select it
Bring up the get info box for it (type "command-i")
At the bottom of get info, click the lock and enter the password you're using on the NEW Mac account
Put a check into "ignore ownership on this volume" (sharing and permissions)
Close get info
Now you can copy from the backup to the new account, and all that you copy will assume "ownership" under the NEW account.
Now it's time to get a piece of paper and pencil. You're going to need to keep notes.
BE AWARE that you CANNOT copy the "top level" of folders in your old account to the new one. By this I mean the folders named documents, music, library, photos, movies, etc.
HOWEVER -- you CAN copy [almost?] all of the files and folders that are INSIDE OF these folders. That includes things like preferences, etc.
This is why you need to keep some jotted-down notes, to "know where you are".
As I said, I've done this before.
It -IS- "a job".
But it can be done.
One just has to do it step-by-step, in the right order...
Final thought:
Is the "new account name" really that important to you?
