Click on Disk Utility then Continue first of all to get your Mac's hard drive wiped. Select Erase and then confirm your choice. Follow the instructions that appear on screen, license agreements and all, and choose the hard drive to use in most cases it'll be the only one available.
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Along the way you can sign in with your Apple credentials to get your apps and iCloud links back again. You're going to be looking at about an hour's worth of reinstalling time but after that you're good to go and ready to enjoy your good-as-new Mac OS X experience.
You might find that some of those apps and shortcuts you had installed weren't actually that useful after all. Open adampash. The A. Filed to: Mac OS X Filed to: Share This Story. Share Tweet. Kinja is in read-only mode. We are working to restore service.
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- How to Securely Erase Data from Your Mac and External Drives.
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Odds are everyone does these things. 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.
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.
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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:.
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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.
How to Securely Erase Data from Your Mac and External Drives | The Mac Security Blog
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. 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.
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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.
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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.
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