Is TL2017 not yet available at CTAN mirrors? Here's what I get when I try to update from a pretest installation: /usr/local/bin/tlmgr: open tlpdb(ftp://ctan.math.ca/tex-archive//tlpkg/texlive.tlpdb) failed: at /usr/local/texlive/2017/tlpkg/TeXLive/TLPDB.pm line 360. Bob T.