iMessage and FaceTime Stopping on Older Macs? Here’s the Fix (Big Sur & Catalina 2026 Warning)

281views

If you’re still rocking a trusty old Mac on macOS Big Sur or Catalina, we have some important news for you, and honestly, it’s a bit of both worlds. The bad news: iMessage and FaceTime on your Mac are on a countdown clock. The good news: Apple has already released the fix, and it takes less than 5 minutes to apply.

In this guide, we’ll break down exactly what’s happening, which Macs are affected, and how to make sure your iMessage and FaceTime keep working without any interruptions.

iMessage and FaceTime Stopping on Older Macs

What’s Actually Going On? (The Simple Explanation)

Think of your Mac like a building that needs a security badge to get into Apple’s servers. That badge has an expiry date stamped on it. When it expires, the doors close — and apps like iMessage, FaceTime, and even the Mac’s activation process can no longer get in.

These security badges are called digital certificates. Apple’s certificate used by iMessage, FaceTime, and device activation was set to expire in January 2027. For modern Macs running macOS Sequoia or Tahoe, Apple has already quietly renewed those certificates through regular updates.

But for older Macs stuck on Big Sur or Catalina? Those systems stopped receiving regular updates years ago. Without a dedicated patch, their certificates would expire — and iMessage and FaceTime would simply stop working overnight.

⚠️ KEY POINT: Without installing the update, iMessage, FaceTime, and even Mac device activation will stop working after January 2027.

Apple’s Surprise Response: Updates for ‘Dead’ Systems

On February 2, 2026, Apple did something that genuinely surprised the tech community. They released software updates for operating systems they officially stopped supporting years ago:

macOS Big Sur 11.7.11 — released more than two years after Big Sur’s official support ended
macOS Catalina Security Update 2026-001 — for Macs still running Catalina (10.15.8)
iOS 16.7.14 and iPadOS 16.7.14 — for older iPhones and iPads
watchOS 6.3.1, 9.6.4, and 10.6.2 — for legacy Apple Watch models

Why did Apple bother? Because millions of users are still running these older systems — especially on hardware that simply can’t be upgraded. Apple’s coordinated release across all these platforms shows they’re aware people don’t abandon working hardware just because it’s no longer “officially” supported.

💡 DID YOU KNOW: macOS Big Sur 11.7.11 contains no new security patches or bug fixes beyond the certificate extension. Its sole purpose is to keep iMessage, FaceTime, and device activation working past January 2027.

Which Macs Are Affected?

You’re in the affected group if your Mac is running macOS Big Sur (11.x) or macOS Catalina (10.15.x) and cannot upgrade to a newer version of macOS.

Macs Limited to macOS Big Sur (11)

MacBook (Early 2015 and 2016)
MacBook Air (2013 and 2014)
MacBook Pro (Late 2013 and 2014)
Mac mini (Late 2014)
iMac (Late 2014 and 2015)
Mac Pro (Late 2013)

Macs Limited to macOS Catalina (10.15)

MacBook Air (2012)
MacBook Pro (2012 and Early 2013)
Mac mini (Late 2012)
iMac (Late 2012 and Early 2013)
Mac Pro (Late 2013) — also eligible for Catalina

📋 QUICK CHECK: Click the Apple menu () > About This Mac. If your macOS version starts with 10.15 (Catalina) or 11.x (Big Sur), you need to apply this update.

iMessage and FaceTime Stopping on Older Macs? Here’s the Fix (Big Sur & Catalina 2026 Warning)

How to Install the Fix: Step-by-Step

The process is simple and takes just a few minutes. Here’s exactly what to do, depending on your macOS version.

For macOS Big Sur Users

Backup your Mac first using Time Machine (always recommended before any update).
Click the Apple menu () in the top-left corner of your screen.
Go to System Preferences.
Click Software Update.
You should see macOS Big Sur 11.7.11 available. Click Update Now.
Wait for the download and installation to complete. Your Mac will restart.
After restarting, verify the update by going to Apple Menu > About This Mac — it should show Version 11.7.11.

For macOS Catalina Users

Backup using Time Machine before proceeding.
Click the Apple menu () > System Preferences.
Click Software Update.
Look for macOS Catalina Security Update 2026-001. Click Update Now.
Note: this update is approximately 1.69 GB and may take around 20 minutes to install — longer than a typical security update, so be patient.
Allow your Mac to restart and complete the installation.
After the restart, your system should show 10.15.8 with Security Update 2026-001 applied.

💡 TIP: If Software Update doesn’t show the update immediately, wait a few minutes and click “Check Now” again. Apple’s update servers can sometimes take time to reflect availability in all regions.

What If Software Update Doesn’t Show the Update?

A small number of users have reported that Software Update isn’t showing the patch. Here’s what to try:

Restart your Mac and check Software Update again.
Make sure your Mac is connected to a stable Wi-Fi connection — large updates sometimes won’t appear on weak connections.
Try going directly to the Apple Support Downloads page in Safari (support.apple.com/downloads) and search for “Big Sur 11.7.11” or “Catalina Security Update 2026-001”.
Sign out of your Apple ID (System Preferences > Apple ID > Overview > Sign Out), then sign back in, and check Software Update again.
If you’re using OCLP (OpenCore Legacy Patcher) on an unsupported Mac, follow the specific OCLP update procedure rather than using Software Update directly.

What If iMessage or FaceTime Is Already Not Working?

If you’re reading this after January 2027 and iMessage or FaceTime has already stopped working, here’s what to do:

Install the certificate update if you haven’t already (see steps above).
After the update, open Messages and go to Messages > Preferences > iMessage. Sign out and sign back in with your Apple ID.
For FaceTime, open FaceTime > Preferences and sign out, then sign back in.
Restart your Mac after re-signing in.
If issues persist, open Terminal and run: sudo killall -HUP mDNSResponder to flush your DNS cache, then try again.

⚠️ NOTE: If your Mac still cannot activate after applying the update, it may be a separate issue related to Apple ID or network settings rather than the certificate. Try signing out of iCloud entirely and signing back in.

Should You Stay on Big Sur or Catalina — or Upgrade?

This is the elephant in the room, and we’ll be straight with you. Installing 11.7.11 or the Catalina security update will keep iMessage and FaceTime working — but it doesn’t solve the broader security problem.

macOS Big Sur and Catalina have not received security vulnerability patches since 2023. Every new exploit discovered since then remains unpatched. So while your messages will keep working, your Mac is increasingly exposed to other risks.

Your Options, Honestly Assessed:

Stay on Big Sur/Catalina with the update: iMessage and FaceTime work until at least January 2027. But you’re running an unpatched system. Use an updated browser like Chrome or Firefox, avoid suspicious downloads, and consider a VPN on public Wi-Fi.
Upgrade to a newer macOS if your hardware allows: If your Mac can run macOS Monterey, Ventura, or Sequoia, do it. Even Monterey (which ended support in 2024) is significantly more secure than Big Sur or Catalina.
Use OCLP (OpenCore Legacy Patcher): If your Mac hardware is officially maxed out at Big Sur or Catalina but you want to run a newer macOS, OCLP can unlock macOS Monterey, Ventura, or even Sequoia on unsupported Macs. We have a full guide on this — check out our OCLP section.
Start planning for new hardware: If your Mac is a 2012–2014 model, it has served you incredibly well. But apps are starting to drop support for these older systems. It might be time to start budgeting for a replacement.

OCLP Users: Special Instructions

If you’ve used OpenCore Legacy Patcher to run a newer macOS on an older, officially unsupported Mac, the certificate update process is slightly different. Do NOT use the standard Software Update path for this, as it can break your OCLP installation.

Instead:

Open OCLP and check for a new patcher version first.
Update OCLP if a newer version is available.
Use OCLP’s built-in update mechanism to apply macOS updates — don’t run Software Update directly.
After any update, always re-run OCLP’s Post-Install patches to restore GPU acceleration and other functionality.

For a full walkthrough, check our dedicated OCLP guides in the OCLP for Mac section of the site.

Frequently Asked Questions

Will iMessage stop working immediately after January 2027 if I don’t update?

It depends on the exact certificate expiry date, but the short answer is: yes, at some point after January 2027, iMessage and FaceTime will stop working without the update. Don’t leave it to chance — the update is free and takes just minutes.

Does macOS Big Sur 11.7.11 include any new features or security patches?

No. This is purely a certificate extension update. It adds no new features, does not fix any security vulnerabilities, and does not change any app behavior. Its only function is to extend the certificate that allows iMessage, FaceTime, and device activation to continue working.

My Mac runs macOS Mojave or High Sierra — am I affected?

Apple has not released a certificate update for Mojave (10.14) or High Sierra (10.13) at this time. This may mean Apple considers those systems beyond the scope of this fix, or that an update may come later. It’s worth monitoring Apple’s security updates page if you’re on these versions.

Is the Catalina update really 1.69 GB just for a certificate fix?

Yes, and it surprised the community too. The large size is likely because macOS updates in the era of sealed system volumes require rebuilding a significant portion of the system image even for small changes. Some community members have speculated it may include additional undisclosed fixes, but Apple has not confirmed anything beyond the certificate extension.

Will future Apple updates continue to support my old Mac?

This is impossible to guarantee. Apple’s release of these updates was a positive and somewhat unexpected move. However, it doesn’t signal a return to full support for Big Sur or Catalina. Think of it as a courtesy patch rather than ongoing maintenance. For continued security, upgrading your hardware or using OCLP remain the best long-term strategies.

Final Thoughts: Don’t Wait Until Your Messages Go Dark

The fact that Apple released these updates at all is genuinely good news for anyone still relying on older Mac hardware. It’s a clear signal that Apple understands people have working machines they want to keep using, and that cutting off core communication services like iMessage and FaceTime is not something to do lightly.

But the fix only works if you actually install it. So if you’re on macOS Big Sur or Catalina, head to System Preferences > Software Update right now and get it done. It’ll take less time than reading this article — and it means your Mac will keep talking to the world without interruption.

And if you’re thinking about what comes next for your older Mac — whether that’s exploring OCLP, considering an upgrade, or squeezing more performance out of your current system — we’ve got you covered right here on iTech4Mac.

Have questions or running into issues? Drop them in the comments below — we read every one.

iMessage and FaceTime Stopping on Older Macs? Here’s the Fix

What’s Actually Going On? (The Simple Explanation)

Apple’s Surprise Response: Updates for ‘Dead’ Systems