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Archive for May 29th, 2018

by Tom Nelson

Securely wiping a drive, removing all of its data, and ensuring that no meaningful information can be recovered, has long been a feature of Disk Utility and its erase function. Even though the default for Disk Utility is a simple erase, a secure wipe was just a few clicks away.

Two recent changes have made the traditional secure wipe, performed by overwriting a volume multiple times with various types of data patterns, largely a thing of the past. The first change, leading to less reliance on the various secure wipe options, has been the proliferation of SSDs, both as original equipment provided by Apple and by resellers, such as OWC, which bring higher performance storage systems to the Mac.

Using the Security Options to sanitize a volume may be a thing of the past. Screen shot © Coyote Moon, Inc.

The second change that directly affects the Mac community, at least in the way free space can be securely erased, is the release of the APFS file system, and how it makes use of shared space between multiple volumes.

In this guide, we’re going to look at erasing volumes, partitions, and containers. We’ll be looking at drives formatted with APFS as well as those formatted with the traditional HFS+ file system. If you’re working with macOS Sierra or earlier, you may find the Rocket Yard Guide: How to Use Mac’s Disk Utility to Securely Wipe a Drive a good source of information for erasing your drives.

We’ll be using the Disk Utility app included with macOS High Sierra and later.

Read more on Rocket Yard, The MacSales.com Blog

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