If I update to IOS 12 do I have to update my Apple Watch?


macrumors regular
Original poster
Apr 4, 2011
If I update my iPhone to iOS 12, do I have to update my Apple watch to watchOS 5 or could I stay on watchOS4?


macrumors 65816
Apr 3, 2010
Heart of the midwest
You can stay on watchOS 4. I have a series 0 watch on 4.3 and it still works just fine on iOS 12. Since it cannot be updated to 5.0 anyway I’m glad it still works. If iOS 13 drops support for it my iPhone will probably just stay on 12.

Last year OS 3 worked on iOS 11, but once 11.3 I think it was? It required it to be updated.

So a future iOS 12 update might require 5. But for now 4.3 works just fine! Hope that helps!


macrumors G4
Jan 8, 2012
My watch suggested I do it but I ignored it for a couple minutes with no ill effects.
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