Goodbye Mac OS X and welcome to macOS Sierra. The most exciting thing about macOS Sierra is that it will be available to download as a public beta in July from beta.apple.com.
You can still download the macOS Sierra Developer Preview if you’re not an app developer. But you’ll need to enrol in the Apple Developer Program, which requires a payment of $100.
Before downloading macOS Sierra Developer Preview, ensure that your Mac can run the software. to run macOS Sierra, you’ll need a MacBook from late 2009.
If you are using you’ll be okay with a model from late 2009 or better.
Download macOS Sierra Beta Now
go to the Apple Developer Program enrollment webpage and follow the instructions. If you are an individual or sole proprietor/single person business, sign in with yourApple ID to get started. You’ll need to provide basic personal information, including your legal name and address.
Source – TechRadar
