MacRumors published a story that Apple has released macOS Big Sur 11.5.1 with security updates.
Apple Releases macOS Big Sur 11.5.1 With Security Updates
Apple today released macOS Big Sur 11.5.1, a minor bug fix update that comes close to one week after the launch of macOS Big Sur 11.5.
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Apple Releases macOS Big Sur 11.5.1 With Security Updates