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Release 6.12/04 - 2017-12-13


This is the first version of the v6.12 release branch! (Who likes "00"-releases anyway? And 02 had a fundamental issue fixed right after the tag.)

Here are a couple of the main news items:

  • TDataFrame has new operations, e.g. storing a tree into a new file, possibly adding new branches and selecting entries.
  • More supported platforms: Xcode 9.2 on MacOS 10.13, new clang, new GCC; partial support for C++17. (Windows: we are getting there, 2018 is the year!)
  • Improved multi-threading capabilities: e.g. TH1::Fit() can evaluate in parallel and supports vectorization.
  • Invoking root with root -t enables multi-threaded execution for internal operations - faster results!
  • Convolution and normalized sums of TF1s.
  • Several improvements in TMVA
  • auto-coloring ("PFC", "PLC", "PMC" options) now also available for TF1
  • list initialization for PyROOT: C++'s f({"name", "title", 64, -4, 4}) (calling void f(const TH1F& h)) can now be invoked as f(('name', 'title', 64, -4, 4)) in Python.
  • lots of new supported classes and options in the JavaScript ROOT drawing and I/O library JSROOT.

NOTE that this release has a bug in GL / Eve that will be fixed shortly; see ROOT-9158

For all details, see the release notes:

Release Notes

The release notes for this release can be found here.

Source distribution

Platform Files Size
source root_v6.12.04.source.tar.gz 155M

Binary distributions

Platform Files Size
CentOS Cern 7 gcc4.8 root_v6.12.04.Linux-centos7-x86_64-gcc4.8.tar.gz 134M
Linux fedora26 gcc7.2 root_v6.12.04.Linux-fedora26-x86_64-gcc7.2.tar.gz 121M
Linux fedora27 gcc7.2 root_v6.12.04.Linux-fedora27-x86_64-gcc7.2.tar.gz 121M
Ubuntu 14 gcc4.8 root_v6.12.04.Linux-ubuntu14-x86_64-gcc4.8.tar.gz 119M
Ubuntu 16 gcc5.4 root_v6.12.04.Linux-ubuntu16-x86_64-gcc5.4.tar.gz 121M
OsX 10.12 clang90 root_v6.12.04.macosx64-10.12-clang90.dmg 125M
OsX 10.12 clang90 root_v6.12.04.macosx64-10.12-clang90.tar.gz 125M
OsX 10.13 clang90 root_v6.12.04.macosx64-10.13-clang90.dmg 123M
OsX 10.13 clang90 root_v6.12.04.macosx64-10.13-clang90.tar.gz 123M

Installations in CVMFS

Standalone installations with minimal external dependencies are available at:



The entire ROOT source can be obtained from our public Git repository:

git clone

The release specific tag can be obtained using:

cd root
git checkout -b v6-12-04 v6-12-04