During updates and boots, these stored hash values are compared to hash values computed from the data in the current system volume. SSV runs every file in the system volume through the SHA-256 hashing algorithm and then stores the resulting hash values in the filesystem metadata. Any change to the input value, no matter how small, will result in a completely different hash value - which is what makes cryptographic hashing such a useful tool for verifying the integrity of files. In cryptographic hashing, an input value is run through a special mathematical algorithm in order to produce an output value (this output value is referred to as the “hash value”).
SSV uses cryptographic hashing to verify the integrity of all system data when installing, updating, or even booting macOS Big Sur. In Big Sur, this protection is taken one step further with the Signed System Volume (SSV). In macOS 10.15 Catalina, Apple introduced the read-only system volume, which stored system content in its own separate area in order to prevent tampering with core OS files.
The reason is that Apple sees Big Sur as a major milestone in the evolution of macOS, and wanted the OS number to reflect that. Instead of following the old 10.x convention, Big Sur will be the first version of macOS 11 (not to be confused with macOS 10.11 El Capitan). However, there is one major change this time around: the version numbering system has been updated. In this guide, we’ll tell you everything you need to know about the Mac’s new and improved OS! About the name and numberĮver since 2013, Apple has used California landmarks to name each new version of their flagship OS, and macOS “Big Sur” is no exception. Apple will soon release macOS Big Sur to the public - and it looks like it will bring a number of important security and privacy enhancements.
0 kommentar(er)
