MacOS 11.0

macOS 11.0 (build 20A2411) is the first public release of macOS 11 (Big Sur) in November 2020 by Apple Inc. Though it came pre-installed on early shipments of Apple M1-based Macs, security updates necessitated macOS 11.0.1 becoming the first standalone release of Big Sur to the general public on November 12, 2020, in a similar situation as macOS 12.0 to 12.0.1 for the first Apple M1 Pro and M1 Max-based MacBook Pros in the following year.

Development history
The first developer beta of macOS 11.0 (build 20A4299v) was seeded on June 22 during the 2020 Worldwide Developers Conference. Build 20A4299w came pre-installed on early 2020 Developer Transition Kits. A second beta (build 20A4300b) was released on July 7. A fourth (build 20A5343i) was released on August 4, 2020.