Hi,

In a nutshell, boot into the recovery partition. Go to Disk Utility and erase 
the HD. Then install MacOS X onto the newly erased volume. It’s the Disk 
Utility part that erases your drive and data. Consider using the secure erase 
option.


Good luck.
—K
Faith doesn’t give you the answers, it merely stops you from asking the 
questions.


On Dec 1, 2014, at 10:12 AM, Krister Ekstrom <[email protected]> wrote:

> Hi, i know this topic has recently been up for discussion but i missed the 
> thread for it and so i’m afraid i’ll have to ask again. I want to sell my 
> macbook Air but before i do, i want to clear out the contents of my hard 
> drive and install the latest operating system. How do i go ahead doing that? 
> Can i do this from the recovery disk partition of my mac or what gives here?
> /Krister
> 
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