The RC1 version of Big Sur is a near-final version of the operating system, which means it's very close to the final release. Here are some of the key features and changes you can expect:
If you're a developer or a beta tester, you can download Big Sur RC1 from the Apple Developer website or through the Software Update mechanism on your Mac. Keep in mind that RC1 is a pre-release version, and it's not recommended for production use. big sur rc1
Note: While Apple has long since closed the signing window for Big Sur RC1 (meaning you cannot officially install it today without the specific IPSW file and Apple Silicon), here is how the installation process worked for users at the time. The RC1 version of Big Sur is a
If you installed RC1 and found it unstable (a common issue with early Big Sur builds on older Intel Macs), downgrading is the only escape route, but it is destructive. Note: While Apple has long since closed the
Big Sur dropped support for 32-bit applications entirely (Continuing from Catalina).
: