The best way to give someone else my imac

[Serban]

So i can't do a format (which format is the best?) and after that i can install maveriks and after that if i log out from my apple account ,everything is ok or it is something else remaining from my user installed?

 

[eduardrw]

So i can't do a format (which format is the best?) and after that i can install maveriks and after that if i log out from my apple account ,everything is ok or it is something else remaining from my user installed?

Boot into the recovery partition.

From there (disk utility) delete your main partition - create a new partition (default values). Then install OS X into your new partition.

All of this from within your recovery partition.

 

[kendrickhphoto]

I don't think he will have a recovery partition on that if it's on Mavericks. They only have the Internet Recovery and that you get to by holding down Command+Option+R.

 

[Weaselboy]

I don't think he will have a recovery partition on that if it's on Mavericks. They only have the Internet Recovery and that you get to by holding down Command+Option+R.

Mavericks also creates a hidden recovery partition on the drive that a command-r will boot to. On newer Macs you have both the drive based command-r and the Internet recovery based command-option-r like you mentioned.

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So i can't do a format (which format is the best?) and after that i can install maveriks and after that if i log out from my apple account ,everything is ok or it is something else remaining from my user installed?

http://support.apple.com/kb/HT5189

This should fix you up.