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- #How to wipe mac clean and reinstall original os how to#
- #How to wipe mac clean and reinstall original os software#
- #How to wipe mac clean and reinstall original os download#
- #How to wipe mac clean and reinstall original os windows#
But once that’s over and done with, and you’ve verified that the data has been safely backed up, actually carrying out a factory reset is simple whether you’re on a Mac, Chromebook, or Windows PC.Īpple last fall introduced computers using its own homegrown M1 processor, also known as Apple silicon. Of course, you’ll want to back up any important data you may have to another drive, or to the cloud, before you perform a factory reset (or, perhaps, break out the hammer and nails). “Just make sure you're wearing safety glasses.” “The gold standard in hard drive security consists of using a pointy nail and a few swift swings of a hammer,” he says half-jokingly. That’s why Richard Fisco, who oversees electronics testing for Consumer Reports, cautions that some consumers may feel more comfortable removing the hard drive altogether before sending the laptop off to its new home.
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#How to wipe mac clean and reinstall original os software#
Theoretically, however, a determined hacker may be able to use advanced data recovery software to unearth your old files, even if you’ve performed a factory reset. So if you're handing off your old computer to a friend or sibling, or donating it to a well-known charitable organization, the steps listed below should suffice. In most cases, wiping a computer with a factory reset will be sufficient to safeguard your personal data. "Reinstalling your system before sale is a much safer alternative.” Or you can miss deleting some important files altogether," he says. If you booted from a USB disk, click “Continue” to advance to the installer.“You're likely to forget things like passwords saved in browsers and personal data in the deleted items folder. If you booted from a functioning recovery partition, click the “Reinstall macOS” button. With your information wipe complete, you are now ready to reinstall macOS. If you choose three or five passes, you might want to leave this running overnight. If you opted to wipe your drive securely, this might take a while-30 minutes to an hour is not unreasonable for one pass. Just give your drive a name (I recommend “Macintosh HD”, just for consistency’s sake), then click “Erase” to start the overwriting process. You only need to write over a drive once to securely wipe it, but if you’re paranoid you can also wipe it three or five times.Ĭlick “OK” once you’ve decided, but remember: if your Mac has a solid state drive, you do not need to use these options. Now move the dial up, to randomly write data over your entire drive. You still need to wipe the drive, however, or your files will remain in place, so skip to the end of this step to do so.) (If your Mac has a solid state drive, you can skip this part: your SSD will already securely erase files thanks to TRIM. If you’re wiping a mechanical drive, click “Security Options” in the window that pops up. Click your primary drive, then click “Erase” If not you can find Disk Utility in the menu bar: click Utilities then Disk Utility. To get started, click the Disk Utility option.ĭepending on how you started Recovery Mode, you may be presented with the option to start Disk Utility right away, as seen above.
#How to wipe mac clean and reinstall original os how to#
We’ve shown you how to securely wipe a hard drive with your Mac, and doing so in Recovery Mode isn’t really different from doing so within macOS. If you want a truly clean installation, however, you need to first wipe your hard drive. We recommend backing up files before you do this, just in case, but otherwise you’re ready for step three. Your user accounts and files will stay exactly where they are-only your operating system will be overwritten.
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If you want to re-install your operating system, but leave your files in place, you can skip this step. RELATED: 8 Mac System Features You Can Access in Recovery Mode Step Two: Securely Wipe Your Hard Drive (Optional) Once you’ve managed to open up the Recovery Mode in some fashion, we can move on to wiping your drive securely.
#How to wipe mac clean and reinstall original os download#
You can access recovery without a partition using Network Recovery: hold Command+Shift+R while turning on your Mac and it will download the Recovery features for you. Failing that, you can create a bootable USB installer for macOS Sierra, and boot from that by holding “Option” while turning on your Mac. If neither of these options work, don’t panic! You’ve got a couple of options yet.