Following matching developer releases the day prior, Apple on Tuesday issued its second public betas of iOS 10.3.2 and macOS 10.12.5.
For users of the initial betas, the downloads are available over-the-air or through the Mac App Store, respectively. People wanting fresh access must have a free account with Apple's Beta Software Program.
Both iOS 10.3.2 and macOS 10.12.5 are essentially maintenance updates, eliminating bugs and security vulnerabilities.
While changes in macOS are uncertain, iOS 10.3.2 is known to fix problems with third-party VPN apps. People may encounter problems with incomplete Siri text responses, something Apple will likely fix in the finished code.
Apple has included iTunes restore images for iPhone 5, iPhone 5c and the fourth-generation iPad, meaning the latest beta does indeed support 32-bit devices.
iOS 10.3, released in late March, converted devices to the more efficient Apple File System, and introduced several features such as "Find My AirPods" and a new reviews API.
Update: 32-bit support noted.