![]() Users with a need for even more security can use a 7-pass erase feature that writes data over free disk space seven times. ![]() ![]() Using a process called “zeroing out,” you overwrite the entire contents of the disk with binary zeroes. Securely erasing your Mac’s hard drive We’ve already covered to make sure that what’s on the drive is securely deleted. If your Mac is newer and has an SSD, you need to take additional steps. Post Syndicated from original If you’re prepping your Mac for sale, trade-in or handing it down to a friend or relative, you should erase the hard drive first – that way your data won’t fall into the wrong hands. If I opt for the 7-Pass option (should be enough, there's nothing particularly sensitive on there), how long can I expect the whole procedure to take? Are we measuring in hours or days? The HDD is 500GB in size. I want to securely erase the HDD and then reinstall OS X from the restore discs. I have an iMac that I'm about to list for sale. Since you can't quite do this on your own, and just 'trashing' the files won't do much, Apple's Disk Utility has several aptly named 'Secure Erase'. When you move an item to the Trash and click 'Empty Trash,' your data is still recoverable. How to Securely Erase Data From a Mac Hard Drive.
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