Just shy of a week after the last release
, Apple has issued its seventh beta of the forthcoming maintenance release, 10.9.3, to developers. As before, the new version lists no known issues, and asks testers to focus on any remaining issues with graphics drivers, audio, Mail, Safari, and the re-introduced feature of local syncing
of Contacts and Calendar data through iTunes to local devices. The new build, 13D43, also includes preliminary support for pixel doubling
on 4K displays.