Should you update to macOS Sonoma 14.8.9?
Yes, today. macOS Sonoma 14.8.9 is a security update Apple released on 6 Aug 2026 for Mac. It fixes 1 security flaw.[1] One of them is already being used in attacks.
It is the newest macOS Sonoma release, so it’s the one to have.
Should you update?
Yes, today. One of the flaws it fixes is already being used in attacks. Every security update closes holes that become public the moment it ships, so the risk of staying on the old version only grows. Waiting a week to see if others hit problems is a common habit; with a security update it’s the wrong trade.
Is macOS Sonoma 14.8.9 safe to install?
Yes. It’s Apple’s own security release, and updates rarely go wrong; a backup makes it painless if one does. The one unsafe way to get it is from a link: Apple never sends updates by email, text or pop-up, so install it only from System Settings → General → Software Update.
What it fixes
Apple lists 1 security flaw across 1 parts of macOS. For each, Apple says what an attacker could have done before the fix.[1]
| Part | Flaws | What an attacker could do |
|---|---|---|
| Screen Sharing | 1 | An attacker on the network may be able to authenticate to Screen Sharing without valid credentials |
Used in attacks
This fix closes a flaw that attackers were already using before the update came out, either on CISA’s list of flaws being used in attacks or in Apple’s own words.[2]
How to update, and how long it takes
It takes 15 to 45 minutes in all: a few minutes to download, then it prepares, installs and restarts, and you can’t use the Mac while it installs.
- Back up first if you can.iCloud backup or your computer. Updates rarely go wrong, but a backup makes it painless if one does.
- Open Apple menu → System Settings → General → Software Update.Your Mac shows the newest version it can run. Tap or click Update Now, or Upgrade Now for a new major version.
- Leave it plugged in.It downloads, prepares and restarts. Expect 15 to 45 minutes.
- Turn on automatic updates.In the same place, under Automatic Updates, turn on both downloading and installing security responses and updates.
To check it worked: Apple menu → About This Mac shows the macOS name and version. It should say Sonoma 14.8.9 or later.
Older devices
The same day, Apple released macOS Tahoe 26.6.1 (1 security flaw) and macOS Sequoia 15.7.9 (1 security flaw) for Macs that stay on an older version. Each fixes the same holes where they apply.
Sonoma 14.8.8 vs Sonoma 14.8.9
macOS Sonoma 14.8.8, released 27 Jul 2026, fixed 137 security flaws. macOS Sonoma 14.8.9 fixes 1 security flaw and includes the fixes before it, so going straight to Sonoma 14.8.9 gets you both.
- Before: macOS Sonoma 14.8.8, 27 Jul 2026, 137 security flaws
- After: none yet. This is the newest.
- macOS updates, every release and the latest version
- Updates, the latest version of everything HARD tracks
References
- ^ Apple. “About the security content of macOS Sonoma 14.8.9”, 6 Aug 2026.
- ^ Cybersecurity and Infrastructure Security Agency. “Known Exploited Vulnerabilities Catalog”.