Apple has released the first developer beta of their upcoming macOS Sierra version 10.12.6 for developers. They recently introduced the public build v10.12.5 that mainly includes bug fixes alongside some minor software improvements.

The Cupertino-based Fortune 500 firm will also be holding their annual developer conference, the WWDC  2017 shortly in June this year. As usual, the new developer beta can be downloaded from their 'Download Center' or through the Software Update built in their Mac App store.

According to a report from The Mac Observer, Apple hasn't announced any new features part of the developer release likely indicating another key maintenance ahead of their WWDC event. Meanwhile, their current public release, the macOS Sierra 10.12.5 mainly improves system stability and adds mainstream support for media-free installation of the Windows 10 creators update using 'Boot Camp'.

Details from MacRumors suggests that Apple is wrapping up development of the current version 10.12 since the company will now divert their concentration towards bringing out the version 10.13 to macOS Sierra. Apple will shortly provide an update about the upcoming version possibly at the convention next month. Numerous sources on the internet predict that Apple is going to come up with replacements for their existing devices earlier than expected since their annual release schedule is in September every year.

Apple has also listed a detailed changelog for the macOS Sierra 10.12.5 update on their support portal. The company is celebrating two key events this year with one being the grand opening of their new Corporate headquarters completely powered by renewable energy with the help of solar roofing on all sides. Apple is also celebrating their tenth year anniversary of selling their iPhones which are why the smartphone industry expects the developer to come out with totally redesigned iPhones than rather than seeing the same iPhone 6 type design for all these years now.