Annual update released for TeX Live
The texmf/ directory, for example, has been merged into texmf-dist/, while the TEXMFMAIN and TEXMFDIST Kpathsea variables now point to texmf-dist. The developers have also merged several language collections for easier installation. Users will find native support for PNG output and floating-point numbers in MetaPost. LuaTeX now uses version 5.2 of Lua and includes a new library (pdfscanner) for processing external PDF data, and xdvi now uses freetype instead of t1lib for rendering.
Several updates have been made to XeTeX: HarfBuzz is now used instead of ICU for font layout and has been combined with Graphite2 to replace SilGraphite for Graphite layout; support has also been improved for OpenType.
TeX Live 2013 is open source software, licensed under a combination of the LaTeX Project Public License (LPPL) and a number of other licences. The software works on all of the major operating systems, although the program no longer runs on AIX systems using PowerPCs. Mac OS X users may want to take a look at MacTeX, which is based on – and has been updated in line with – TeX Live.