Quick answer: before upgrading to macOS 27 (Golden Gate), check that your Mac is Apple Silicon (Intel Macs can’t run it), back up with Time Machine, confirm any specialised software you rely on has been updated, and start the install when you won’t need the computer for a couple of hours. The rest of this post covers each of those in plain English, from someone who fixes these upgrades for a living here in Lithgow.
Most things on a Mac go smoothly — software updates, Time Machine backups, and upgrading to a new operating system. But there are times when it doesn’t just work. If you’re thinking, “I paid good money for this, it should be flawless,” I get it — I’d say the same. But there’s a reason every town, no matter how small, has a car service centre. Here are a few things to think about before upgrading to macOS 27.
Quick pre-upgrade checklist
- Check your Mac supports macOS 27 (Apple Silicon only)
- Confirm any specialised software you rely on has been updated
- Run a Time Machine backup
- Start the upgrade when you don’t need the computer for a couple of hours
- Know where to go if something goes wrong
Is your Mac even eligible for macOS 27?
This is the one people miss most. macOS 27, nicknamed Golden Gate, was released on September 14, 2026, and it only runs on Apple Silicon Macs — anything with an M1 chip or later. That covers MacBook Air and MacBook Pro from 2020 onward, iMac from 2021 onward, Mac mini from 2020 onward, Mac Studio, and the 2023 Mac Pro.
If your Mac still has an Intel chip, macOS 27 isn’t an option — Tahoe (macOS 26) is the last update Apple will release for Intel Macs. Not sure which one you’ve got? Click the Apple menu, then About This Mac, and it’ll tell you straight away. Bring it into MonkeyBar Help Desk if you’d rather we check for you.
You don’t have to learn anything new
This one’s for the seniors who are worried about having to learn something new. The truth is, versions of macOS are similar enough that even I take a moment to spot which one a computer is running. Sure, a few icons change, but macOS 10.6 and macOS 27 aren’t as different as you’d think — like your great-grandfather being able to drive a current car. The GPS might confuse him, but the steering wheel, brake, and mirrors work the same way they always did.
So don’t fear the upgrade. If you’re sharp enough to spot the differences, you’re sharp enough not to worry about them.
Will your software still work on macOS 27?
For most people, this isn’t a big deal. It matters more if you rely on specialised software from a smaller company, which is why I always suggest waiting a month after release so any bugs get ironed out.
Smaller software vendors often don’t have the resources to test against a new macOS release before it ships, so while 90% of upgrades go smoothly, that other 10% can be a genuine headache. The big names — Apple’s own apps, Microsoft Office (which has its own long history of Mac quirks, a topic for another post) — usually handle new versions well, since they’ve had months to work out the bugs.
If you want to check for yourself, look up the software maker’s website for official compatibility notes (skip the comment sections — they’ll have you convinced your computer’s about to catch fire). If there’s a real problem, the developer will usually post a clear warning not to upgrade yet.
Back up before you upgrade
You should already be running regular Time Machine backups. If you’re not, start now — it’s one of the best backup tools available, and it came free with your Mac.
This matters because while the vast majority of macOS 27 upgrades go off without a hitch, the rare one that doesn’t might mean wiping and reloading the drive. That’s the moment a Time Machine backup pays for itself.
I haven’t seen a single case of data loss from an upgrade in 25 years of doing this — but I’d be a poor technician if I didn’t insist you back up first anyway.
Don’t start the upgrade in the middle of your day
These upgrades take time — often an hour or two — and your Mac is unusable while it runs. It’s a hands-off, automated process, so resist the urge to watch the progress bar. It will test your patience.
What to do if something goes wrong
I’ll never tell anyone not to visit an Apple Store — they’re genuinely good at what they do. But if you’re in Lithgow, Oberon, or Katoomba, it’ll probably be faster to bring it to our MonkeyBar Help Desk instead. We’re happy to help.
Frequently asked questions about upgrading to macOS 27
What is macOS 27 called?
macOS 27 is nicknamed Golden Gate. Apple released it to the public on September 14, 2026.
Can I install macOS 27 on an Intel Mac?
No. macOS 27 only supports Apple Silicon Macs (M1 chip or later). Intel Macs are limited to macOS Tahoe (26), which is the final version Apple will release for them.
How long does the macOS 27 upgrade take?
Usually one to two hours, depending on your Mac and internet connection. Start it when you don’t need the computer for a while, ideally overnight or before you head out.
Do I really need to back up before upgrading to macOS 27?
Yes. A Time Machine backup takes only a few minutes to set up, and it’s the difference between a minor inconvenience and a real data-loss problem if the upgrade runs into trouble.
What should I do if macOS 27 causes problems on my Mac?
Bring it in to MonkeyBar Help Desk at MacMason in Lithgow, or visit your nearest Apple Store. Either way, don’t panic — upgrade issues are almost always fixable.