breaking news: Graft cases: Khaleda’s next hearing July 13 EU gives €1m in aid for Mora victims in Bangladesh Minor boy killed in Cox’s Bazar landslide 9 kg gold bars seized at Shahjalal Airport, 1 held Anti-militancy drive continues in 4 districts No militant found at Gaibandha raid homeNational Apple unveils sixth beta versions of iOS, mac-OS Sierra Apple unveils sixth beta versions of iOS, mac-OS Sierra

A week after the last set of releases, Apple has launched the sixth beta versions of iOS 10.3.3 and mac-OS 10.12.6 for testing by developers.

The updates are intended for maintenance, bug fixes and security enhancements, said a report on appleinsider on Thursday.

The current iOS 10.3.3 beta is either build number "14G57" or "14G58" while the mac-OS current Sierra 10.12.6 build is "16G24b".

At its annual annual Worldwide Developers Conference (WWDC) in the US recently, Apple introduced iOS 11, a major update to the worlds most advanced mobile operating system.

With this, Apple announced it would bring new experiences and several new features to iPhones and iPads this fall.

Augmented reality is coming to hundreds of millions of iOS devices with a new platform for developers to build apps that let users place virtual content on top of real-world scenes.

iOS 11 is the biggest software release ever for iPad, with powerful multitasking features, the Files app and more ways to use Apple Pencil.