I want to install and try out the new features of macOS 10.12. Also I really want to work on Xcode 8.0. But the same time I have some client projects which should written on Swi
You should also be aware that you need the current public releases of macOS (El Capitan) and Xcode (7.3) to create and submit archives to the iTunes App Store. Archives created with beta versions Xcode (8b1), or with the current Xcode 7.3 on a beta version of macOS (Sierra 10.12b1) won't be accepted (submission process fails). It's advised you backup your system before installing the macOS beta, and/or install the beta OS on a new partition. You can also install the current OS and Xcode on a small partition (10-20GB or so) if you'll need to make a submission in the next 3 months, and remove it when the public releases are available. It takes a little setup, tho, to configure your signing certs, etc.