I want to install MacTex2021 on an unsupported MacOS version, 10.13.6 (High Sierra), because I don't want to give up only old MacBook 2009 ... Any help is appreciated.
I follow the instructions on https://www.tug.org/mactex/mactex-unix-download.html for installing 2021 on unsupported OSX versions, among which High Sierra. When I run install-tl I see the gui but nothing happens. It can also be run in text mode but this also fails. Changing the repository had no effect.
sudo ./install-tl --gui=text Loading https://mirror.ctan.org/systems/texlive/tlnet/tlpkg/texlive.tlpdb
./install-tl: TLPDB::from_file could not initialize from: https://mirror.ctan.org/systems/texlive/tlnet/tlpkg/texlive.tlpdb ./install-tl: Maybe the repository setting should be changed. ./install-tl: More info: https://tug.org/texlive/acquire.html
Edit. I was able to install. TexDist2021 ran successfully.
I asked a new question since the Tex Live utility does not run. See: TexLive fails with version mismatch message quoting version nr to be 2^64 - 1. Known bug?