In that case, when you expand the Centrify tarball (or DMG), you'll see file named CentrifyDC-version.pkg; double-click it and follow the instructions of the wizard.
https://docs.centrify.com/en/centrify/macadmin/#page/macadmin%2Fadm_Installing.html%23
Note: you should always upgrade the Centrify client FIRST; then the operating system. Feel free to leverage the Mac OS Sierra resource here:https://www.centrify.com/support/macos-sierra-download/