Apple seeded two new beta builds to developers today, bringing a host of bug fixes and improvements to iOS 10.2.1 and macOS 10.12.3.

The new builds come just three days after Apple dropped its first batch of betas for 2017. Registered developers can now download iOS 10.2.1 beta 4 and macOS 10.12.3 beta 4 from Apple’s developer portal to take advantage of all the new features.

Developers received a fresh new batch of beta software from Apple today, just two days after the company launched iOS 10.2 and tvOS 10.1 to the public.

The new first betas for macOS 10.12.3, iOS 10.2.1 and tvOS 10.1.1 all come with a number of bug fixes and performance enhancements, but they likely don’t contain any major new features.