If you now query the content of page 7, the operating system, which detects the detour in the background, delivers the 3107 content. It is only marked as invalid and replaced by a new page, e.g. With a solid-state drive, the pages are not individually irretrievably overwritten to do this, the old data must first be deleted and then entire data blocks must be replaced with new content.Īn example: You apparently instruct the SSD via the macOS user interface to overwrite page 7 in the data block. This is even possible in small amounts of memory (“page”).
MAC DISK UTILITY SECURE ERASE MAC
If you want to securely erase an SSD on the Mac without data being able to be restored, you have to say goodbye to the thought of multiple overwriting with zeros first.īecause with a magnetic disk, old data is simply deleted and replaced by new data by overwriting it. With the other structure, which, by the way, is not the same for SSDs as for SD cards, there are different procedures for secure deletion. HDDs and SSDs therefore differ significantly from each other. Securely delete SSD on Mac: that is the problem!
MAC DISK UTILITY SECURE ERASE PRO
For this reason, I would not recommend this option to everyone, but rather to people who travel a lot with their Mac / MacBook / MacBook Pro and who have an increased risk of their Mac falling into the wrong hands. However, one thing should be clear: If you lose or forget the key for decryption, there is no way to get to the data on the hard drive. I could not find any loss of performance due to the activation. The FileVault encryption implemented by Apple offers a high level of security against data theft. Now you have to unlock the lock at the bottom left (with an admin password) and then activate FileVault. There you will find a tab "FileVault" at the top, which you can click on. Open the system settings and select "Security" there. Since this is certainly also interesting for other readers, here are the brief instructions: Update: Activate FileVault on the MacĪ reader just asked me by email, where you can activate FileVault hard disk encryption on your Mac. If necessary, you can ensure more protection and security when commissioning an SSD drive by activating FileVault encryption. Secure erase options are not provided in Disk Utility for a solid-state drive (SSD). Due to the different way in which chip memories work, such as an SSD hard disk, such a hard disk should be processed with the hard disk service program, so the option for multiple overwriting is not available. HDD storage with magnetic storage disks). This contains, among other things, information on multiple overwriting of the hard drive which is to be formatted - as well as the information that this option is only available for magnetic media (i.e. Sir Apfelot recommendation: Clean up your Mac hard drive with CleanMyMac Multiple overwrite only applies to magnetic mediaĪpple offers for deleting and formatting a storage medium on or in the Mac computer a comprehensive guide at. TL DR: The app solution presented at the end is the BitRaser File Eraser from Stellar In this guide, I'll show you how you can still clean up the Mac memory so that no restoration is possible from the remnants of data. The same is due to the fact that a "Solid State Drive" (SSD) works differently than a "Hard Disk Drive" (HDD). The background was that the hard disk utility under macOS no longer offers the option of writing zeros to the hard disk 7 times in order to eliminate possible residual data. How to safely erase an SSD on a Mac without data being able to be restored, that is what a reader wanted to know from me recently.