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.
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