Apple has launched the iOS 18.4 Beta 1 developer preview but has since withdrawn the update due to reported issues, such as persistent boot loops on certain devices. Notably affected are the iPhone 12 series and specific iPad models, which are currently incompatible with this version. Similarly, the watchOS 11.4 Beta 1 for the Apple Watch Series 6 has also been recalled for related concerns. Apple has assured users that it will re-release the updates once these issues have been satisfactorily addressed.