Apple has released the second public betas of macOS Sierra 10.12.5 and iOS 10.3.2 public beta number two. The former is a minor update that focuses on bug fixes and speed improvements.The latter offers under-the-hood bug fixes and security improvements.
If you’re not already signed up for the public beta program, you can do so at https://beta.apple.com/sp/betaprogram/. The public beta program is free, but remember: beta software is unfinished software so use with care.