Big Sur 11.6.4 and the macOS Catalina security update are now available from Apple

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Apple published macOS 11.6.4 on Monday, a security upgrade for macOS Big Sur as well as a security update for macOS Catalina.

Both the macOS Big Sur 11.6.4 security update and the macOS Catalina security update 2022-002, according to the company’s release notes, enhance macOS’s security. While it’s unclear exactly what the new Monday upgrades offer in terms of security changes, Apple recommends them for all users.

There are software upgrades available in System Preferences for anyone who are still using macOS Big Sur or Catalina.

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The release of macOS Big Sur 11.6.4 comes only a few days after the release of macOS Monterey 12.2.1, which corrected a bug in WebKit that might have permitted arbitrary code execution. This problem has been extensively exploited, according to a statement from Apple back then.

On the same day, Apple provided security upgrades for Safari 15.3 on macOS Big Sur and macOS Catalina that fixed the WebKit vulnerability.

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