Help make the next releases of iOS, macOS, and tvOS our best yet. As a member of the Apple Beta Software Program, you can take part in shaping Apple software by test-driving pre-release versions and letting us know what you think.
Do you feel like dancing with the devil?
Apple have made their upcoming OS releases available for public consumption today.
Since going the “public” beta route these betas are definitely a lot more stable than the developer ones you have to pay for access to but they’re by no means finished.
Install these at your own peril and if you do may I suggest it be on an machine/phone that is not day to day critical.
Source: Apple Beta Software Program