我曾尝试使用 在 Mac 上安装 Beamer tlmgr，但它要求我更新tlmgr，所以我照做了。现在，当我尝试安装包时，它会抱怨说wget未安装（但事实并非如此，我在 Mac 上，但更新之前一切正常）。有什么建议可以解决这个问题吗？（除了安装wget）
输出如下：
$ tlmgr install beamer
tlmgr: package repository
http://ctan.mirror.garr.it/mirrors/CTAN/systems/texlive/tlnet (not verified: gnupg not available)
tlmgr itself needs to be updated.
Please do this via either
tlmgr update --self
or by getting the latest updater for Unix-ish systems:
http://mirror.ctan.org/systems/texlive/tlnet/update-tlmgr-latest.sh
and/or Windows systems:
http://mirror.ctan.org/systems/texlive/tlnet/update-tlmgr-latest.exe
Then continue with other updates as usual.
tlmgr: Terminating; please see warning above!
$ tlmgr update --self
tlmgr: package repository
http://ctan.mirror.garr.it/mirrors/CTAN/systems/texlive/tlnet (not verified: gnupg not available)
tlmgr: saving backups to /usr/local/texlive/2016basic/tlpkg/backups
[1/2, ??:??/??:??] update: texlive.infra [197k] (41476 -> 44462) ... done
[2/2, 00:01/00:02] update: texlive.infra.x86_64-darwin [277k] (40402 -> 43815) ... done
tlmgr: package log updated: /usr/local/texlive/2016basic/texmf-var/web2c/tlmgr.log
running mktexlsr ...
done running mktexlsr.
$ tlmgr install beamer
/Library/TeX/texbin/tlmgr: Initialization failed (in setup_unix_one):
/Library/TeX/texbin/tlmgr: could not find a usable wget.
/Library/TeX/texbin/tlmgr: Please install wget and try again.
/Library/TeX/texbin/tlmgr: Initialization failed (in setup_unix_one):
/Library/TeX/texbin/tlmgr: could not find a usable xzdec.
/Library/TeX/texbin/tlmgr: Please install xzdec and try again.
tlmgr: Couldn't set up the necessary programs.
Installation of packages is not supported.
Please report to [email protected].
Use of uninitialized value $r in split at /Library/TeX/texbin/tlmgr line 3980.
tlmgr: Cannot find main repository, you have to tag one as main!