# Cannot find Font T2A/cmr/m/n/9=larm0900, even in texlive-lang-cyrillic

I use babel with the russian option, and the error message is that

Font T2A/cmr/m/n/9=larm0900 at 9.0pt not loadable: Metric (TFM) file or installed font not found. 

Firstly, I use tlmgr to search for this font, but there is no result. Then I download texlive-lang-cyrillic from Macport, but I cannot find Font T2A/cmr/m/n/9=larm0900 in it.

If anyone has larm0900.tfm, please share it.

Update

As suggested by egreg , I did sudo tlmgr install collection-langcyrillic and the tex file can be compiled, but the output is just a blank. This is because I used Xelatex, the output is normal when I use Pdflatex.

But is it possbile to use Xelatex and get the normal output?

• Why not installing MacTeX? I have long removed MacPorts from my machines. Oct 27 '16 at 22:59
• What I installed is BasicTex. If you have larm0900.tfm, could you share it? Oct 28 '16 at 6:41
• You don't upgrade BasicTeX by installing MacPorts packages. If you need new packages over BasicTeX, you have to use TeX Live Utility. Oct 28 '16 at 6:48
• Launch TeX Live Utility, go to the “Packages” tab and install the cyrillic collection. But installing MacTeX is much easier. Oct 28 '16 at 7:00
• If you use XeLaTeX on that example file, you would not receive a warning about a T2A encoded font. So the edit has nothing to do with your original question. The output with XeLaTeX is blank because the default font doesn't support Cyrillic. Can you please be more specific? Oct 28 '16 at 7:43

For the font problem you need to install the cyrillic collection; however, you'll also need the babel-russian and the hyphen-russian TeX Live packages.

You can use tlmgr (as super user) or TeX Live Utility for install the missing packages. However, I recommend you to get rid of BasicTeX and to install the full MacTeX.

In order to run the example file (which appeared in one version of your question) with XeLaTeX you need to use a font that supports Cyrillic, which the default Latin Modern doesn't.

Here we enter a mine field. The full MacTeX provides several OpenType fonts supporting Cyrillic, but you have BasicTeX, so probably none of them. You need to use fontspec and choose a font you have available among the system fonts. For instance, if you have PT Serif, you can do

\documentclass{article}
\usepackage[russian,english]{babel}
\usepackage{fontspec}

\setmainfont{PT Serif}

\begin{document}
\begin{otherlanguage*}{russian}
Интерференция света и теорема Белла
\end{otherlanguage*}
\end{document}