Apple has launched two operating system (OS) updates for the Mac. The updates are macOS Sonoma 18.4.3 and macOS Sequoia 15.7.3. Both contain critical security fixes.
This release was made in conjunction with the launch of iOS 26.2 and other OS versions from Apple. For the Sonoma version, this OS update is specifically aimed at improving the security of older Mac hardware.
Although the beta version of macOS Tahoe 26.2 is more anticipated, Apple is working on the beta version of macOS Sonoma 18.4.3 and macOS Sequoia 15.7.3 in parallel. Now, both versions have come out of the beta phase.
For both versions released, Apple detailed their main goals in the release notes. The notes state that these updates provide important security improvements and are recommended for all users.
Similar to the release of iOS 18.7.3 and iPadOS 18.7.3, Apple has not updated its support page. Specific details regarding the security content fixed in this release are not yet available, but details are expected to follow in the near future.
Although the details have not been revealed, Apple emphasizes the urgency of this update. Users who are still running macOS Sequoia are strongly encouraged to update their Macs as soon as possible. That way, their devices will be protected from potential vulnerabilities.
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