You can install macOS Big Sur on any of these Mac models. If your Mac is not compatible, contact your local IT support team.Īs with any major upgrade to the operating system, the update could impact some of your existing applications. Find out which version of macOS you are using by following Apple's instructions. We will continue to support macOS Big Sur and Monterey. 27, 75 days after the appearance of Catalina's 10.15.6.To maintain information security at HMS, we will no longer support macOS Catalina after October 30, 2022. If Apple sticks to that pattern, it will post Big Sur on the Mac App Store on Monday, Sept. The past three macOS upgrades were all released on a Monday: Catalina on Oct. The three-year average gap between one edition's final non-security update and its successor's release: 74.3 days. And the year before that, Sierra's final non-security update, 10.12.6, shipped July 19, or 69 days before High Sierra debuted in final form.
In 2018, High Sierra's last non-security update, 10.13.6, appeared on July 9, 77 days before Mohave's launch. Last year, for instance, Mohave's final non-security update, 10.14.6, made the scene on July 22, or 77 days before Catalina's release. More telling, Apple has a habit of releasing the last non-security update for the then-current edition about 10 weeks before the successor goes public. When a new edition launches – this year's upcoming Big Sur – the oldest (n-2) falls off the support list.
Apple supports the latest edition of macOS (call it "n") and the two before that ("n-1" and "n-2).
Likewise, the Security Update 2020-004, also issued Wednesday, was almost certainly the last for macOS 10.13 High Sierra, the operating system Apple launched in September 2017.
For the last three cycles – Mojave, High Sierra and Sierra – Apple released six non-security updates to each edition the four before that topped out at five updates apiece. MacOS 10.15.6 will likely be the final non-security update to Catalina, the still-current Mac operating system. Most of the flaws, absent a fix, might have let criminals run attack code on a compromised Mac. The update also patches 19 security vulnerabilities in 16 of Catalina's components, ranging from Audio and Kernel to Mail and Wi-Fi.
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