To a great degree, the operating system wars of the 1980s and 1990s are done. As it happens, Android is the current leader but on our desktops and laptops, Windows rules the roost. However, the big change is that choosing a computer no longer limits what operating systems you can use. Dual-booting an virtualisation make it easy to run multiple OSes on the one computer. Earlier this week, Apple released an incremental update to macOS. The sixth iteration of Sierra, version 10.12.5, has added a handy feature for those wanting to use macOS' dual-boot functionality, Boot Camp.
If you're looking to run the Windows 10 Creators Update, you won't need to install the Anniversary Update first and then do an in-place upgrade to the Creators Update.
The release notes for Sierra 10.12.5 say the update “adds support for media-free installation of Windows 10 Creators Update using Boot Camp"
You'll need a .iso image of the Windows 10 Creators Update for the installation but at least you won't have to go through the installation process twice.