One Simple question

You should ask your friend for the "restore" CDs that came with the computer

 

If you can't get the install disks that came with the computer from your friend, you can call Apple Customer Service at 800-676-2775 for replacement disks.

 

I don't know how much the disks cost, but you could get the snow leopard install disk for 30 bucks or less, but you would lose iLife

 

there talking about the osx disks. your friend has them. they give u a copy when u buy the computer. you basically erase everything on the hd then put the disk in and boot the computer up and install. this is so you start fresh and have no junk files that have collected over time. you can find out exactly how to do this on apples site. search erase and re install in the support section

 

As said many times above you need to get the restore CDs from your friend.

Otherwise just make a new account, then delete his user folder. You can get a free app called appcleaner to erase any of his old apps you dont want.

 

Look at this guide: http://macs.about.com/od/applications/ss/diskutilformat.htm

And use MRoogle, as your question has been answered more often than there are words in this post.



Btw, a more specific and descriptive thread title (for future endeavours) could get you more answers.

Also have a look at the following links, as the information presented there might be helpful in your future endeavours into Mac OS X and could clear up initial confusion and may even prevent harm to your system or your files.


http://www.apple.com/support/switch101/ - text


http://www.apple.com/findouthow/mac/ - videos


http://www.apple.com/support/mac101/ - text


http://support.apple.com/kb/HT1343-keyboard - shortcuts