Release 6.22/08 - 2021-03-12

Release Notes

The release notes for this release can be found here.

Several crucial bugs have been fixed; we highly recommend upgrading. This release is the only one offering Windows binaries, due to virus scanner false positive reports on older versions.

Source distribution

Platform Files Size
source root_v6.22.08.source.tar.gz 165M

Binary distributions

Platform Files Size
CentOS 7 root_v6.22.08.Linux-centos7-x86_64-gcc4.8.tar.gz 186M
Fedora 30 root_v6.22.08.Linux-fedora30-x86_64-gcc9.3.tar.gz 226M
Fedora 31 root_v6.22.08.Linux-fedora31-x86_64-gcc9.3.tar.gz 226M
Fedora 32 root_v6.22.08.Linux-fedora32-x86_64-gcc10.2.tar.gz 228M
Ubuntu 16.04 root_v6.22.08.Linux-ubuntu16-x86_64-gcc5.4.tar.gz 201M
Ubuntu 18.04 root_v6.22.08.Linux-ubuntu18-x86_64-gcc7.5.tar.gz 219M
Ubuntu 19.04 root_v6.22.08.Linux-ubuntu19-x86_64-gcc9.2.tar.gz 224M
Ubuntu 20.04 root_v6.22.08.Linux-ubuntu20-x86_64-gcc9.3.tar.gz 225M
macOS 10.14 x86_64 Xcode 10 root_v6.22.08.macos-10.14-x86_64-clang100.pkg 315M
macOS 10.14 x86_64 Xcode 10 root_v6.22.08.macos-10.14-x86_64-clang100.tar.gz 200M
macOS 10.15 x86_64 Xcode 12 root_v6.22.08.macos-10.15-x86_64-clang120.pkg 309M
macOS 10.15 x86_64 Xcode 12 root_v6.22.08.macos-10.15-x86_64-clang120.tar.gz 198M
macOS 11.2 x86_64 Xcode 12 root_v6.22.08.macos-11.2-x86_64-clang120.pkg 309M
macOS 11.2 x86_64 Xcode 12 root_v6.22.08.macos-11.2-x86_64-clang120.tar.gz 198M
preview Windows Visual Studio 2019 (debug) root_v6.22.08.win32.vc16.debug.exe 154M
preview Windows Visual Studio 2019 (debug) 227M
preview Windows Visual Studio 2019 root_v6.22.08.win32.vc16.exe 84M
preview Windows Visual Studio 2019 113M

Installations in CVMFS

Standalone installations with minimal external dependencies are available at:


Example for setting up ROOT from CVMFS

. /cvmfs/


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 v6-22-08 v6-22-08


Windows 10/7/… are supported. We offer two packaging types:

  • exe: a regular Windows installer package also setting up the required environment variables. With uninstall via “Control Panel” / “Add or Remove Programs”. Simply download and start. You can double-click ROOT to run it; ROOT files get registered with Windows.
  • tar: unpack e.g. with 7zip. Start ROOT in a Microsoft Visual Studio Prompt (in Start / Programs / Microsoft Visual Studio / Tools). If you installed ROOT to C:\root then call C:\root\bin\thisroot.bat before using ROOT to set up required environment variables.

Important installation notes

  • You must download the binary built with the exact same version of Visual Studio than the one installed on your system.
  • Do not untar in a directory with a name containing blank characters.
  • Take the release version if performance matters.
  • If you want to debug your code you need the ROOT debug build (you cannot mix release / debug builds due to a Microsoft restriction).