macOS Sequoia 15.8.1 (security update)
Apple released macOS Sequoia 15.8.1 with security fixes. Available for: macOS Sequoia
- Published by source
- 2026-09-28
- First seen by Reality Radar
- 2026-10-22
- Last verified
- 2026-10-22
Affected
- Manufacturer
- Apple
- Products
- macOS Sequoia 15.8.1 macOS Sequoia
- Versions
- 15.8.1
Whether your exact unit is affected depends on the model, serial number and region in the official notice.
What the official notice says
Risk: security release
Remedy / actions:
- Update to macOS Sequoia 15.8.1
Is this affecting you?
Add what you own or use and Reality Radar will tell you when official changes match it — with evidence and next steps.
Sources
- Apple security releases Tier A · official published 2026-09-28
Evidence ledger
Every piece of evidence we store is appended to a public hash chain, so later edits are detectable. Anyone can re-verify it.
| Entry | Kind | Observed | Evidence hash | Entry hash |
|---|---|---|---|---|
| #300 | new | 2026-10-22 | 44114e99558b…b7b060 | b184c4260ab8…97d546 |
Chain head: #1076 8ad5adc30b9b…88ce20