Apple releases macOS 27.0 (26A428) after developer RC, with no security details disclosed

Apple shipped macOS 27.0 final (build 26A428) on 2026-09-14, five days after seeding the same build as a Release Candidate to developers; neither announcement lists security fixes or CVEs.

Apple seeded macOS 27.0 Release Candidate (build 26A428) to developers on 2026-09-09, then published the final macOS 27.0 release carrying the identical build number 26A428 on 2026-09-14. Both notices provided only download and release-notes links. Neither the RC announcement nor the final release announcement described any security content: no CVEs, patched vulnerabilities, or threat information were specified. Apple major OS releases typically detail security fixes in separate release notes, so security content for macOS 27.0 may exist but has not been stated in these announcements.

• macOS 27.0 Release Candidate, build 26A428, seeded to developers on 2026-09-09.
• macOS 27.0 final release announced on 2026-09-14 with the same build number, 26A428.
• No CVEs, security fixes, or threat details were included in either announcement.
• Both notices linked only to downloads and release notes; security content, if any, is expected in separate release notes.