SHA2 checksum for Sierra's InstallESD.dmg? Before making a bootable drive for Sierra's installer i want to make sure that the download was successful. 

Run in Terminal: shasum -a 256 "/Applications/Install macOS Sierra.app/Contents/SharedSupport/InstallESD.dmg"

Wait some minutes for the result to show up.

Mine is: 78a2701bb63a0dcb30862314d1a4598522cfe6a2dd2b096a4e30f256909a4446
A comprehensive list of sha1 checksums of the InstallESD.dmg (or similar files) in various OS X/macOS installer apps is available here: Mac OSX Installers SHA1 Checksums.

The sha2 checksum of the InstallESD.dmg of macOS Sierra 10.12.0 is indeed: 78a2701bb63a0dcb30862314d1a4598522cfe6a2dd2b096a4e30f256909a4446