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iPhoneHacks predicts that the official release time for macOS Big Sur is likely to be 12:00 am PST on November 12th and 3:00 am on 13th November in Japan time.
Announced at the event that it will be provided on Thursday, November 12, local time
Apple announced at an event held on November 10th local time that it will offer a new macOS Big Sur compatible with Apple Silicon on Thursday, November 12th local time.
iPhoneHacks predicts that macOS Big Sur will likely be available for download from 12:00 PST on November 12th, and 3:00 am PST on November 13th, given the release time of iOS14. ..
For 2013 model and later
MacOS Big Sur can be installed on MacBook Air, MacBook Pro, Mac Pro after 2013 model, iMac and Mac mini after 2014 model, MacBook (12 inch model) after 2015 model, and after 2017 model. It is referred to as iMac Pro.
macOS Big Sur 11.0.1 RC already available for developers
Apple has released a second MacOS Big Sur 11.0.1 Release Candy Date (RC) version for developers prior to the official release of macOS Big Sur.
Source: iPhoneHacks
(FT729)
Source: iPhone Mania