Question: can series 1 apple watch update to os 6?
Answer: This time around, watchOS 6 will be supporting all of the same Apple Watch hardware as watchOS 5, meaning even Apple Watch Series 1 users will get to update to the latest software when it's publicly released. ... watchOS 6 will be compatible with Series 1, 2, 3, and 4 and will require an iPhone 6s or later.