我在 OS X 10.10.5 上使用 MacTeX 2015，暂时不想升级到 2016。但是，我想升级到最新的软件包版本。
升级后tlmgr我首先收到一个错误，提示存储库已过期。我能够修复这个问题，多亏了这个答案， IE
tlmgr option repository ftp://tug.org/historic/systems/texlive/2015/tlnet-final
但是，现在我在执行以下操作时收到以下错误tlmgr update -all：
TeX Live 2015 is frozen forever and will no
longer be updated. This happens in preparation for a new release.
If you're interested in helping to pretest the new release (when
pretests are available), please read http://tug.org/texlive/pretest.html.
Otherwise, just wait, and the new release will be ready in due time.
tlmgr: package repository ftp://tug.org/historic/systems/texlive/2015/tlnet-final
tlmgr: saving backups to /usr/local/texlive/2015basic/tlpkg/backups
tlmgr: no updates for tlmgr present.
tlmgr: no updates available
有人能帮助我设置 texlive 以便更新软件包吗？