Always back up important data before formatting the drive, otherwise it will be lost forever. While this may be obvious, it is important to note and remember that this process removes all data from the drive, which then cannot be restored due to highly secure formatting options. Protect the protected format of the SSD (or OS X boot disk) in recovery mode Make sure you understand it and are happy with this potential before proceeding. For users using an SSD, it is important to note that the use of secure formatting options, such as 7 and 35 pass-through, can lead to shortened drive life or degraded performance, although TRIM is believed to reduce this risk. The first time is not a safe removal, it is the second time a design that allows you to achieve the desired result.
This is a good workaround because you technically wipe the drive twice during the process.
The most obvious solution to this problem is to boot your Mac from an external boot drive (this is how you can do one for Mountain Lion), but it’s not always an option for everyone, but luckily there is a workaround that allows you to perform a secure removal directly from the recovery partition itself. Nevertheless, many users want the option of securely erasing data from the SSD. The exact reason for this isn’t entirely clear, although some speculate, because writing 1 and 0 to an SSD can lead to poor performance and shorter drive life, and that it continues even in the latest versions of OS X, it’s not just a bug.
Newer Macs have a recovery partition instead of a separate external recovery disc, and if you’ve ever booted a newer Mac, iMac, MacBook Air, or MacBook Pro from an SSD partition in the Recovery partition to format the drive, you may have noticed that the “Security Settings” button is grayed out settings, which ostensibly precludes the usual “secure” removal operation.
I hope you all like this guide How to Secure Erase a Mac SSD / Hard Disk from Recovery Mode. I will try my best so that you understand this guide very well. This guide is about the How to Secure Erase a Mac SSD / Hard Disk from Recovery Mode.
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