If you own a 2019 MacBook Pro, a 2020 iMac, or a Mac Pro that cost as much as a car, macOS 27 won't appear in Software Update. Golden Gate is the first macOS release that runs only on Apple silicon, and macOS 26 Tahoe is the final version for every Intel Mac.

That sounds more dramatic than it is. Your Mac didn't stop working on September 14. But the clock has started, and knowing what happens when helps you decide whether to replace it next month or in 2028.

Which Macs are affected

These Intel Macs run Tahoe but can't upgrade to Golden Gate:

  • MacBook Pro 16-inch (2019)
  • MacBook Pro 13-inch (2020, four Thunderbolt 3 ports)
  • iMac 27-inch (2020)
  • Mac Pro (2019)

Older Intel Macs that couldn't run Tahoe were already on earlier versions and are further along the same path.

Not sure what you have? Apple menu > About This Mac. If it lists a Processor with an Intel model rather than a Chip starting with M, this article is about your Mac.

Security updates: about three years

When Apple announced that Tahoe would be the final release for Intel Macs, an Apple spokesperson said Intel Macs compatible with Tahoe will keep receiving security updates for three years. That puts the expected end somewhere around fall 2028.

Apple is still actively shipping those updates. On the same day Golden Gate launched, it released macOS Tahoe 26.7.

Two caveats worth knowing:

  • "Security updates" isn't "fully patched." Apple has said that only devices running the latest major OS version should expect to be fully protected. Older versions get important fixes, not necessarily every fix.
  • Updates may thin out over time. Three years is a commitment to security support, not a promise that every Intel model receives identical updates for the entire period.

In practice, an Intel Mac on Tahoe is reasonably safe for everyday use for the next couple of years, as long as you keep installing Tahoe updates and keep your browser up to date.

What changes before security updates end

Security updates aren't the first thing you'll lose. Software support usually goes first.

New apps and app versions. Developers increasingly build for Apple silicon only. Adobe has already said version 27 of Premiere Pro, After Effects, Media Encoder, and Audition require Apple silicon; Intel users stay on the 26.x releases. Expect more apps to set macOS 27 or Apple silicon as a minimum over the next two years.

New Apple features. Golden Gate's Siri AI, Apple Intelligence improvements, and every future macOS feature won't reach your Mac.

Cross-platform tools. CrossOver 27 requires an Apple silicon Mac. Other Mac tools with deep system integration will follow.

Browsers usually last longest. Browser makers typically keep supporting a macOS version for a good while after it stops being current, which matters because the browser is where most of your security exposure is. When your browser drops Tahoe, treat it as a firm deadline.

What about patchers like OpenCore Legacy Patcher?

OpenCore Legacy Patcher has kept many unsupported Intel Macs running newer macOS versions for years. It isn't a route to Golden Gate. OCLP doesn't work with Golden Gate, and macOS 27 contains no code for Intel processors at all, so there's nothing to patch onto an Intel Mac.

If you use OCLP on an older Intel Mac, turn off automatic macOS updates so the Mac doesn't attempt an upgrade it can't complete.

Should you replace your Intel Mac now?

Not automatically. Use this as a checklist.

Keep it for now if:

  • It still does everything you need at an acceptable speed.
  • Your key apps still support macOS 26 Tahoe.
  • You don't need Apple Intelligence or Siri AI.
  • It isn't your only computer for work that handles sensitive data long-term.

Start planning a replacement if:

  • A critical app has announced Apple silicon-only versions (check your creative, audio, and development tools first).
  • You rely on Boot Camp for Windows. Boot Camp still works on your Intel Mac, but Apple silicon Macs don't support it, so any replacement will run Windows only through virtualization, such as Parallels with Windows for Arm. That transition takes testing time.
  • Battery, thermals, or performance are already frustrating.
  • You'd sell or trade it in. Intel Mac resale value will keep falling as support ends, so if you're going to switch in the next year, earlier is usually better.

Replace it before fall 2028 in any case if the Mac connects to the internet and handles banking, work email, or client data.

Moving from Intel to Apple silicon: plan for apps, not files

Migration Assistant moves your files, settings, and apps from an Intel Mac to an Apple silicon Mac. Files and settings transfer cleanly. Apps are where the surprises are.

  1. Find your Intel-only apps before you buy. On your Intel Mac, open System Information (hold Option, Apple menu > System Information), go to Software > Applications, and look at the Kind column. Anything marked Intel will run on a new Mac through Rosetta, but only until macOS 28, when Intel apps stop opening.
  2. Don't migrate what you'd have to replace next year anyway. For each Intel-only app, look for a native or Universal version now, including paid upgrades.
  3. Check drivers and plug-ins separately. Printer drivers, audio plug-ins, and hardware utilities are the most common Intel holdouts. Many network printers work without drivers through AirPrint.
  4. Plan for Windows. If you use Boot Camp, set up Windows for Arm in a virtual machine and test your Windows apps before retiring the Intel Mac.
  5. Keep the Intel Mac until the new one is proven. Give yourself two weeks of real work on the new Mac before wiping and selling the old one.

Getting the most from Tahoe in the meantime

  • Install every Tahoe update, including background security updates, as soon as they arrive. Check that System Settings > General > Software Update > Automatic Updates has security responses turned on.
  • Keep apps and browsers updated. Most attacks target apps and browsers, not the OS directly.
  • Remove software you don't use. Fewer old apps and extensions means less exposed surface.
  • Back up regularly. An aging Mac with a failing drive is a bigger practical risk than an unpatched vulnerability.
  • Stop buying new software licenses for the Intel Mac unless they transfer to Apple silicon.

The short version

  • Intel Macs stop at macOS 26 Tahoe. Golden Gate and later won't install, patched or not.
  • Apple says Tahoe-compatible Intel Macs get security updates for three years, roughly until fall 2028.
  • App support fades sooner than security support. Check your critical apps first.
  • There's no need to panic-buy. There is good reason to plan: list your Intel-only apps, watch your key vendors, and choose a replacement date on your terms.