Apple's fourth round of developer betas has arrived, with builds of iOS 26.4, iPadOS 26.4, watchOS 26.4, tvOS 26.4, visionOS 26.4, and macOS Tahoe 26.4 now available for testing.
The fourth developer betas for iOS 26.4, iPadOS 26.4, watchOS 26.4, tvOS 26.4, macOS 26.4, and visionOS 26.4 arrive after the third, which landed on March 2 for most, March 3 for macOS. The second round appeared on February 23, and the first round arrived on February 16.
- iOS 26.4 build 4 is 23E5234a, replacing 23E5223f
- iPadOS 26.4 build 4 is 23E5234a, replacing 23E5223f
- watchOS 26.4 build 4 is 23T5236a, replacing 23T5226e
- visionOS 26.4 build 4 is 23O5235a, replacing 23O5225f
- tvOS 26.34 build 4 is 23L5234a, replacing 23L5224d
- macOS Tahoe 26.4 build 4 is 25E5233c, replacing 25E5223i
The first iOS 26.4 developer beta included changes to Apple Podcasts, Apple Music, end-to-end encryption for RCS, and Stolen Device Protection activation, among other updates.
Other changes in later builds includes a switch of the iPhone bootloader name from iBoot to mBoot, and a new average bedtime metric in Apple Health.
AppleInsider and Apple strongly advise that users don't install beta operating systems or beta software onto what they deem "mission-critical" or primary-use hardware. Instead, they should retain backups of their data and try to use secondary hardware that isn't as essential to maintain.
For general users wanting a less risky experience, Apple typically brings out a public beta version of its updates shortly after the developer counterpart. A more battle-hardened version of the update, with potentially fewer bugs or issues, it is the version that interested members of the public should try, not the developer build.
Find any changes in the new builds? Reach out to us on Twitter at @AppleInsider or @Andrew_OSU, or send Andrew an email at [email protected].
