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If this is a used macbook, then i suggest you reset it to factory settings to avoid any problems similar to this.
If there is no important data on the Mac, then i can take you through the process - Straight Away.
There is lots of important data on this Mac
Please tell me where does it asks for a password?
When I reboot.
Also, I'd like to rename the computer
System preferences - Sharing - Computer name - Edit.
You can rename it from there.
Tell me when it is done doing the mail, we continue with the email.
What does "Use dynamic global host" mean?
Recommended only for hardwired machines using a LAN DNS
provided by the service provider, you do need to edit this.
you do not need to edit this.
I've changed the name, but under "Macintosh HD, Users" it's still a different name
You have changed the name of the computer, the username needs to be changed.
Let me write down the instructions
Can you take a full backup of your data, before we proceed with changing the username.
Changing the username is XXXXX XXXXX complicated process, hence backup is necessary if any thing goes wrong, data should notbe lost as recommended by Apple.
OK, but I can't do it now, need to leave the house. Maybe tomorrow?
No problem, we can do this tomorrow. If you can rate my answer that will be appreciated.
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