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Apple ships public beta 4 for iOS 27, macOS 27, iPadOS 27, tvOS 27 and watchOS 27
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Apple released the fourth public beta for its next-generation operating systems, alongside developer beta 6, bringing UI refinements and bug fixes ahead of a September release.
For engineers testing or developing against Apple platforms, this beta cycle is settling into weekly cadence with fewer visual changes and more under-the-hood work, signaling approach to release candidate. iOS 27's Siri AI and Apple Intelligence features require newer hardware, so compatibility testing must account for a split feature set across supported devices.
Written by elseif from the cluster below · every claim links back to a sourceThe three things worth knowing
Public beta 4 and developer beta 6 are now available for iOS 27, macOS 27, iPadOS 27, tvOS 27, and watchOS 27.
Beta 6 resolves a pinned messages UI bug from beta 5 and adds an updated iOS notification animation and redesigned macOS stoplight window controls.
iOS 27 supports iPhone 11 and later plus iPhone SE 2 and newer, but Siri AI and Apple Intelligence features require newer hardware.
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