Apple’s big software moment of the year is today. And for once, the story isn’t about a flashy new feature nobody asked for.
WWDC 2026 kicks off June 9 at Apple Park, and Bloomberg’s Mark Gurman — who has been right about Apple more often than Apple probably likes — is describing iOS 27 as a “Snow Leopard” update. For anyone who wasn’t around in 2009, Snow Leopard was the macOS release Apple made when it decided to stop adding things and just fix what was already broken. It became one of the most beloved updates the company ever shipped.
iOS 27 is aiming for the same thing.
The codebase is apparently a mess
Gurman describes the current iOS code as “a bit of a mess under the hood” — full of redundant legacy code that does nothing but run background processes that waste energy. The fix? Apple engineers are removing scraps of old code, rewriting features, and subtly upgrading apps to let them perform better — the goal being a snappier, more responsive operating system with better battery life as a side effect.
Engineers are also working on making the Neural Engine run more efficiently — potentially throttling the AI processor based on battery temperature and health, drip-feeding AI tasks instead of hitting them at full speed all at once. That last part matters because AI features have quietly become one of the biggest battery drains on recent iPhones.
Gurman says it’s currently unclear if Apple will actually quantify the battery gains at the keynote — which could mean the improvement is real but modest, or it could mean Apple wants to underpromise and let people notice it themselves.
A rebuilt Siri, finally
Battery life isn’t the only thing on the table. Apple is reportedly rebuilding Siri as a full chatbot to compete with ChatGPT, Claude, and Gemini — complete with a dedicated app, Dynamic Island integration, and a new system-wide “Search or Ask” interface that replaces Siri Suggestions entirely.
The rebuilt Siri is reportedly powered by a 1.2-trillion-parameter Gemini model — which would make it the most capable version of Siri Apple has ever shipped, and a significant climb from where Apple Intelligence landed when it debuted in 2024 to widespread disappointment.
That disappointment has consequences. Apple reached a $250 million settlement in May with iPhone buyers who accused the company of false advertising after the AI Siri features promoted during the iPhone 16 launch remained unavailable for nearly two years. iOS 27 is, among other things, Apple trying to make that right.
Who gets left behind
iOS 27 will drop support for the iPhone 11, meaning owners of Apple’s 2019 flagship are finally being cut off. Everyone from iPhone 12 onwards should be eligible — with the full AI experience, as usual, requiring newer hardware.
Developer betas land the same day as the keynote. Public betas follow in July. The full release comes in September, alongside whatever iPhones Apple announces in the fall.
For users who’ve been silently fuming about battery drain since iOS 26 landed, iOS 27 might be the first update in a while that actually makes their phone feel better without asking them to do anything at all. No new features to learn. No AI experiments to opt out of. Just a faster, longer-lasting iPhone. Sometimes that’s enough.