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Comment by jedberg | Hacker News Reader

I usually use beta OSs, but I completely skipped MacOS 26 and 27, mostly because I heard terrible things about 26.

Is 27 good enough to upgrade from Sequoia? Is your answer the same when I tell you I have an M1 Pro Max?

Yes. I have a M1 8GB MacBook Air that I use as a lightweight travel machine, and macOS 26 utterly trashed the performance on it. Things I used to do fine (work on small Xcode projects) were completely unusable, to the point where I had to downgrade it to Sequoia.

I've been running it on the macOS 27 beta all summer, and it's night and day. It's usable again.

Thanks, appreciate the feedback!

I think its good especially if you are on an M1 generation. This is one of those releases with loads of fixes and speedups and not a whole lot of anything else

Generally you wanna wait for 27.2

I’m on a same boat

Should probably do clean install at this point - M1 still good enough and new laptops cost a fortune.

I would upgrade if only because you would otherwise stop receiving security patches at this point.

macOS 15 should be getting security updates until at least the end of next year. I've been using it for ~2 years and I'll happily spend another year using it.

Correct me if I'm wrong but it's my understanding that macOS 15 security updates are only made available for devices for which 15 is the last compatible macOS version.

You are wrong. Everyone gets it

That's not how it's worked in the past. They did security updates until three versions later released regardless of the hardware. What you may be thinking of is that there was some weirdness around Intel vs M series chips and how those got updates.

Parent is thinking iOS/iPadOS, not macOS. Older devices that are not capable of running iOS 26 are still receiving security updates for iOS 18, but any device supported by iOS 26 is not. It's a real hard push by Apple to get people to swallow Liquid Glass by withholding security updates.

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