![]() ![]() ![]() Apple offers a bypass that Carbon Copy Cloner has managed to take advantage of, which is a low-level copying tool called asr that can in some (but not all) circumstances copy Big Sur’s system volume from an internal to an external drive and keep it in bootable shape. Any change to even a single bit in the volume causes validation to fail (breaking the “seal”). Big Sur picked up on the system/Data volume division of Catalina, but added another layer: when installed or upgraded, macOS’s system volume has a cryptographic wrapper around it that prevents the slighest modification without detection.Įssentially, a Big Sur system volume has to be installed on a freshly erased disk, because the process of making the seal is unique to each volume. (The Big Sur volume isn’t even mounted directly, but as a read-only APFS snapshot, making it even harder for an attacker to find a way in.)īig Sur took that one step further in a way that affects your ability to continue to make backups of the style you might be accustomed to, and which requires a rethink for the present and future. The system volume is read-only and locked against modification during an active macOS session the Data volume can be read and written, and apps on its may be launched. With the concept of a volume group in APFS, Catalina organized all system files and core apps into one volume and all user-owned and user-modifiable data, third-party apps, and some Apple apps into another. This culminated in macOS 10.15 Catalina in splitting macOS into two pieces, which appear seamlessly as a single unit in the Finder, but which severed a long-time intermingling of files. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. Archives
January 2023
Categories |