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Apple's 2026 Mac operating system, succeeding macOS Tahoe, with Siri built into Spotlight, generative Photos tools and native HDR on third-party monitors.
Apple's macOS 27 lets third-party HDR10 monitors keep HDR on at the 2560x1440 scaled resolution, with no extra software. That removes the main HDR drawback of non-Apple monitors on a Mac, so far only on hardware 9to5Mac has confirmed.
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Apple's TestFlight 4.4.0 adds landscape on every iPhone and resizing in iPhone Mirroring on the Mac, weeks before the $1,999 iPhone Duo ships October 23. Teams still shipping portrait-only screens can use it as a working example of the layout work Apple has done on its own apps for the foldable.
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Three tools in the new Photos editing pane synthesize image data inside ordinary consumer libraries. Shared Albums in the same release move those files at full resolution, including to Android and Windows contributors.
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Apple says the M5 Ultra reaches 512GB of unified memory at 1.2TB/s, which settles how big a local agent can get, though the September launch arrives without prices and every AI speed figure is measured against an M1.
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macOS 27 Golden Gate ships a dedicated Siri app with synced conversation history, retention controls and on-screen awareness, per 9to5Mac. That moves Siri from a shortcut to a destination.
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The public and developer tracks are now testing identical binaries, and new-feature finds have thinned out. 9to5Mac puts the official release a few weeks away.
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Apple's sixth round of iOS 27 betas landed a week after the fifth, ahead of a September public release. The parts app teams care about, on-screen awareness and deeper app actions, are still in flux.
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