Boot from a MacOS install DVD and use Secure Erase, then re-install the OS.
Ok, so I'm going to be selling my Mac mini. How do I completely wipe it so all my data is off?
Thanks
Press power button as a cold boot, hold down the 'Alt' key. Go into 'Recovery HD'.
When you're there, select language. Go to Disk Utility. Format Macintosh HD as Extended (Journaled). When that's done, click 'Reinstall OS X'. Install it to the now formatted Macintosh HD.
Not sure why one of the posters gave such a sarcastic answer. I hope this may have actually been of some assistance.
Let me know.
The Recovery HD you are booting into is on the HDD it self so you need to boot from another device (as I have noted). Otherwise you cannot wipe the entire drive. You only wipe the main OS partition (free space) in your suggestion, not the entire drive. Also, what you are suggesting is not wiping. it is just reformatting. You need to choose the secure erase option.
In all honesty it doesn't matter. If you wipe from an external drive and reinstall OS X, it's just going to put the recovery partition back on. All the data is stored on Macintosh HD, not on the recovery HD. You can secure erase Macintosh HD through DU on the Recovery partition if you're seriously paranoid.
All this stuff about writing 0s and the like is just a bit OTT IMHO.
I'm not paranoid. The OP asked about 'wiping'. Your suggestion was not wiping thats all. The OP also wanted to 'completely' wipe it so I suggested the drive, not partition. Anyway, its all good.
Ok, so I'm going to be selling my Mac mini. How do I completely wipe it so all my data is off?
Thanks
Thanks guys
Which is the option key?