BGR reports that its sources have roughly provided the timeline for the final developer seed of the iOS 7, the sixth beta version will be coming next week. The report did not mention the actual date, though Monday would make most sense as it has been the typical release day in the past. After that, Apple will seed the Golden Master version to internal groups and internal partners starting on September 5.
“After iOS 7 beta 6, Apple will be seeding a GM (gold master) version for its employees and partners to test starting around September 5th. This will mostly likely be the software that is released to the public later on in the month of September, barring any major bugs or problems that might be discovered.
After Apple and its partners are comfortable with the gold master build, the company will release it to developers on September 10th, the day of the company’s iPhone event where we should see the new iPhone 5S and iPhone 5C make their first appearances — and they will of course be the first devices to run iOS 7 out of the box.”
Based on past Apple timelines, we could see the final version of iOS 7 release to the public on September 20 together with the launch of the rumored iPhone 5S and hopefully the lower-cost iPhone 5C too.