Apple today released watchOS 5.3.10 and watchOS 8.8.2 for older Apple Watch models that cannot run the latest watchOS 26 update. watchOS 5.3.10 supports the Apple Watch Series 1, 2, 3, and 4, while watchOS 8.8.2 extends compatibility to the Series 3 through 7 and original Apple Watch SE.

The updates address a critical certificate expiration issue affecting core features. Apple's release notes confirm the patches extend the certificate that powers device activation, iMessage, and FaceTime until after January 2027, preventing these essential apps from breaking on older hardware.

This maintenance release ensures millions of Apple Watch owners can continue using their devices without disruption. watchOS 8 remains the final supported version for Series 3 watches, while Series 1 and 2 models running on older iPhones receive their last compatible update with watchOS 5.3.10.