How can I reformat my old mac air, since I have the new one

How can I reformat my old mac_book_air, since I have the new one?

I believe that would be because the usernames on the two computers are different. You will have to change the ownership of everything you copy over from the old computer or change the username on the new computer so it's the same as the one on the old computer. Doing this is a bit complcated:
OS X: How to change user account name or home directory name
Changing file ownership is a bit easier. If you have copied all the files from the old computer into the Home folder of the new computer then do this:
To fix Home folder permissions
Open the Terminal application in the Utilities folder. At the command line prompt enter or paste the following command line:
sudo chown -R `id -un`:`id -gn` ~
Press RETURN. You will be prompted to enter your admin password which will not be echoed.

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How can I change my old Apple ID? I have a new one created but can't deleted the old one it's gray and u can't tap on it?

I'm able to use the new one even tho the old one is there? But can't delete the old one because it's frayed out n can't tap on it to change it to the new one

You will need to use that old Apple ID and password to update any apps you purchased using that account. So you will either need to recover that Apple ID, which if you forgot the password you should be able to reset here:
http://iforgot.apple.com
or you will need to delete all those apps and repurchase them using your current Apple ID.
Regards.

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Welcome to the Apple community.
You can delete an existing account from your device and create a new one and start using it. But I'm not sure what you mean by transfer.

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Reinstall Pages '09 and update it to v 4.3 using the instructions here:
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How can i tidy up folders in windows explorer and have the new names etc recognized by itunes?

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Welcome to AD!
Is your new laptop Vista, and the older desktop XP?
If so, they have different paths to the default library.
On XP, it's c:\Documents and Settings\ username \My Documents\My Music\iTunes\iTunes Music
On Vista, it's C:\Users\ username \Music\iTunes\iTunes Music

How can i sync music from mac air to zen creative mp3 player

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iTunes will only sync with Apple devices. You may find when you plug in your player it appears on hte desktop as another drive. You can drag files from iTunes to that drive. You may need to then place them in a special folder but all this is something for you to research since players differ. We use a Sansa Clip and a RCA player with our iTunes library and that how we do it.
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Premiere Elements: 13 | 12 | 11, 10 | 9, 8, 7 win | 8 mac | 7 mac
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Note the min-requirements for PS CS6 on a Mac.
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HT204306 How can I get my old password back after I have changed it? I cannot change it back because it has been used in the last year

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How can I reformat my old mac air, since I have the new one

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