4/11/2024 0 Comments Apple disk utility format ssd![]() Not all SSD's have this feature built into them. Revive or restore a Mac with Apple silicon using Apple Configurator 2 - Apple SupportĪbout encrypted storage on your new Mac - Apple Supportĭepending on the exact model of the Mac and the SSD used, it may be possible the SSD has a built-in hardware secure erase feature, but this can only accessed from a bootable Linux USB drive and may require several command line commands to execute. Revive or restore an Intel-based Mac using Apple Configurator 2 - Apple Support If you "Restore" the T2 firmware, then I believe it creates a new set of encryption keys which effectively instantly destroys all data on the SSD since without the old encryption keys there is no way to recover any data from the SSD. If you have a 2018+ USB-C Mac, then the SSD is hardware encrypted. You will see some data on the SSD for the partition layout and a few hidden macOS support files, but the majority of the data will show as zeroes and dots. I'm not sure if "xxd" is available while booted from a macOS installer since the installer is quite limited. You can check the contents of the SSD by running the following utility from the Terminal app although you will need to replace "diskX" with the proper drive identifier for the SSD): xxd /dev/diskX I'm not sure what happens when using a third party SSD. With an Apple SSD once you use Disk Utility on macOS to "erase" the SSD (simple erase) the TRIM support on the SSD will automatically clear out the NAND cells. If your data is encrypted as you say, then just destroying the encryption keys are enough to prevent access to the data since there is no way to decrypt the data without the encryption key. Info on keybags and how Apple storage encryption works: Here’s the Monterey feature, with links to other info:Įrase all content and settings on Mac - Apple Support There is no storage-overwrite capability with SSDs, and the multiple-pass-overwrite I/O scheme dates back to external-servo hard disks and floppies from the 1980s when head-tracking was sloppy, at best. This for wear leveling, and for performance. ![]() Writes do not overwrite the same storage, the writes re-vector the write elsewhere. ![]() If the standard and fundamental behavior of an SSD-the integral erase-on-write behavior required for all flash storage-is insufficient, and/or if your data was somehow unencrypted, then you will want to physically shred the storage. Or erase the volume using a new feature of Monterey, as suggested by Apple. Otherwise, format the volume and re-install macOS, as suggested by Apple. macOS uses your password to access a robust generated encryption password, and the storage-erasure procedure steps on the keybag. If the in-built data encryption is insufficient, shred the Mac. You have already decided on the answer you want, and seem uninterested in technical details. I assume this also works for current MacOS
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