After releasing developer betas 6 earlier today, Apple is now rolling out iOS 27 public beta 4, alongside corresponding updates for some of its other platforms. New round of public betas now available: iOS 27 Public Beta 4: Build 24A5418bi; Pad OS 27 Public Beta 4: Build 24A5418b; tvOS 27 Public Beta 27: Build 24J5353b; macOS 27 Public Beta 4: Build 26A5416b (previously 26A5416a).\n\nThe release comes just hours after the company rolled out their corresponding beta 6 versions, introducing bug fixes and performance improvements as Apple fast approaches the official release date of these systems in a few weeks. Today’s mac OS 27 beta introduces a new wallpaper and redesigned stoplight window controls for mac OS 27 Golden Gate.

Other notable changes include: the Pinned Messages UI bug from beta 5 appears resolved in beta 6, updated iOS notification animation, and a Preview icon on the Mac that now matches the iOS version from last week.\n\nThe build number for each public beta matches its developer beta 6, except for mac OS, which had build 26A5416b. At 9:15 p.m. Apple re‑released the mac OS 27 public beta 4 with build 26A5416b.\n\nTo enroll a device in the Public Beta program, visit https://beta.apple.com, sign in with the Apple Account used on the device, accept the terms, then go to Settings > General > Software Update > Beta Updates to install the appropriate beta. Apple recommends installing beta analog on a secondary device or backing up the primary device first.