Erase mac hard drive without disk utility


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Whether it's the NSA, a burglar or someone who rummages through garbage for old hard drives with the intention of extracting data, we can rest assured or not so much that there are people out there who are after your data. Targeted or by accident, if a nefarious individual gets their hands on your data, you can very well end up in trouble. In all of the above mentioned scenarios that warrant a secure wipe of your drive, your data is leaving your possession, so making sure it is properly deleted is paramount.

Disk Utility erases, formats, repairs, and partition hard drives and SSDs

Whether your Mac is used to store school work, projects at work, personal files or just used for browsing the web, information from that Mac is valuable to someone other than you. Also think of photos, videos, chats and again email contents that may include sensitive and personal content that can be used to blackmail you or destroy your reputation.

How To Erase and Reset a Mac back to factory default

Of course, you can keep every hard drive and flash drive you've ever owned to reduce the chances of the above happening, but after a while this method starts taking up a lot of space. So the next best thing is to securely erase them. Even though all new Macs these days come with Flash storage which I'll cover later , there are still plenty of hard drives around and in use today.

Here's how:. Which Security Option should you choose? From the available options that Disk Utility provides, Security Option 1 is, of course, the least secure. Someone will be able to recover your data without much effort. Security Option 4 is the most secure, but it is also widely believed to be a waste of time and electricity.

Personally, I always go with option 2, but if you want to feel more confident your data is securely erased, or if you must comply with company rules, use option 3 or 4. This works for any hard drive, internal or external.

Mac 911: How to erase your Mac's hard drive the right way

Just be aware that if you want to properly erase the hard drive that is also your startup drive, you will have to start your Mac from an external media first. An external hard drive or thumb drive will do. For help creating a bootable external drive, have a look at Apple's page here , or use a popular tool such as DiskMaker X. As you can imagine, having an external bootable drive or installer drive can come in handy. Some people say that the standard erasing of an SSD makes data recovery hard enough for it to be "secure. Technology such as wear leveling , which tries to ensure each memory block on an SSD is used the same amount of times, can really mess with a secure erase.

If we can't be confident an SSD was properly erased, then there is only one route to take that will ensure all data is beyond the reach of anyone: Using encryption. By using FileVault to encrypt the drive startup drive and Disk Utility to encrypt external drives, all the data on the drive will be garbled, unless someone has the encryption key your password.

Now, when it comes time to part with your drive, all you have to do is a basic erase in Disk Utility. This will delete your encryption key, leaving nothing but garbled data on the drive. Without a way to decrypt the garble, even if all of it is recovered, it will be useless. I have read and tried so may solutions online but nothing has changed.

Please help me with another way. If I am currently running a public beta of El Capitan, will this method still work and install the official release of El Capitan? There's a good chance that it will re-install the public beta version, since it was the most recent OS installed on your Mac. Apple suggests installing from the Mac App Store instead. Now I need to format the new HD.

Do I need a utility disk? I never created one on this Macbook Pro can I create a utility disk from a newer iMac? Select the disk from the menu, select your language, then choose Disk Utility from the Utility drop-down menu and proceed to reformat it to the right settings. Then you can go back and install the OS. Try again later can anyone help me how to recover all the apps without recovery disc and without back up? I am just wondering. Hey Adriel.

So I'm having a slightly different issue. I've followed your steps, but every time I hit "erase," it brings up a notice saying: Couldn't unmount disk. I've attached a pic of the error. However, on the left one can clearly see the main " But it allowed me to erase the Macintosh HD option. Why is that? Has my drive been erased nonetheless? Or do I still need to do something else? Is all hope lost? I'm now stuck on the pop up window which says "To download and restore Mac OS X, your computer's eliegiiilty will have to be verified with Apple. Loading Installation information It shouldn't be too long.

If that doesn't do the trick, there's another more complicated course of action you could try. Step 1: Back Up Your Files! When erasing the harddrive, which format is ideal? Could there be a problem with the Apple servers or what? My hard drive crashed on my Imac took it to computer repair they installed new hard drive, tried to recover data but could not, when we presented the imac to the apple store they told me i would have to buy back my old hd from them um hello no way, so thats why we went to another place that works on macs, so apple said i had lion on the mac, i couldnt remeber but now i remember i had leopard, the computer place installed lion, well now I cannot get any of my programs installed from the dics i have, like my photo software, etc, any cd i put in stays in for a minute then pops back out any help on this?

I have tried to do step 3 to get to the OS-X utilities screen.

Make Your Mac Feel Like New Again With a Fresh Install of OS X

I cannot do it. Help needed. Opss almost forgot! Not even the dvd drive is working for the iMac. Happy days indeed. Could it be worst than a bad drive? Also, I don't have a MAC keyboard. I have a Window that works with MAC.

If you never installed macOS Sierra 10.12.4

In summery, my computer has no files and I won't install a new OS. Thank you. I have a Mac Mini, but not a Mac keyboard How do I press the 'command' key on a normal keyboard? Try using the Windows key.


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It should reinstall whatever version you currently have. My original install discs are probably lost for good. Share Your Thoughts Click to share your thoughts. Hot Latest. How To: You're Uninstalling Mac Apps Wrong: