Problems Loading Root to MacBook

James_Bowen · January 6, 2026, 11:55pm

ROOT Version: 6.36.06
Platform: MacOS Tahoe 26.2
Compiler: ?

I have been unable to install Root on my MacBook since an OS update last year. With the most recent update, I tried again, unsuccessfully, using Homebrew. This is what happened when I tried to start Root after executing the Homebrew installation commands:

Mac:root jamesbowen$ root -l
warning: no such sysroot directory: ‘/Library/Developer/CommandLineTools/SDKs/MacOSX14.sdk’
C system headers (glibc/Xcode/Windows SDK) must be installed.
fatal error: module map file ‘module.modulemap’ not found
Module Darwin not found.
Module std not found.
<<< cling interactive line includer >>>: fatal error: module file ‘/private/tmp/root-20251126-18172-bvg823/root-6.36.06/builddir/lib/Darwin.pcm’ not found: module file not found
<<< cling interactive line includer >>>: note: imported by module ‘_Builtin_intrinsics’ in ‘/usr/local/Cellar/root/6.36.06/lib/root/_Builtin_intrinsics.pcm’
Failed to load module _Builtin_intrinsics
Failed to load module ROOT_Foundation_C
Failed to load module ROOT_Config
Failed to load module ROOT_Rtypes
Failed to load module ROOT_Foundation_Stage1_NoRTTI
Failed to load module Core
Failed to load module Rint
Failed to load module RIO
Failed to load module MathCore
Failed to load module Hist
Failed to load module ROOTDataFrame
Failed to load module XMLParser
Failed to load module SpectrumPainter
Failed to load module RooFitHS3
Failed to load module Core
Failed to load module SPlot
Failed to load module TreePlayer
Failed to load module Gpad
Failed to load module Foam
Failed to load module ROOTBrowserv7
Failed to load module Physics
Failed to load module ROOTBrowsable
Failed to load module RCsg
Failed to load module _Builtin_intrinsics
Failed to load module Rint
Failed to load module Minuit2
Failed to load module Thread
Failed to load module Imt
Failed to load module PyMVA
Failed to load module Graf3d
Failed to load module FFTW
Failed to load module Quadp
Failed to load module RooFitMore
Failed to load module Hbook
Failed to load module Postscript
Failed to load module ROOTGraphicsPrimitives
Failed to load module Genetic
Failed to load module ROOT_Rtypes
Failed to load module RSQLite
Failed to load module GCocoa
Failed to load module RIO
Failed to load module HistFactory
Failed to load module FITSIO
Failed to load module ROOTGeomViewer
Failed to load module MathCore
Failed to load module Fumili
Failed to load module FitPanel
Failed to load module RHTTP
Failed to load module Smatrix
Failed to load module ROOT_Foundation_Stage1_NoRTTI
Failed to load module Spectrum
Failed to load module ROOTFitPanelv7
Failed to load module ASImageGui
Failed to load module Geom
Failed to load module Graf
Failed to load module MultiProc
Failed to load module Net
Failed to load module Gviz3d
Failed to load module Eve
Failed to load module Minuit
Failed to load module WebGui6
Failed to load module TMVAUtils
Failed to load module RooStats
Failed to load module ROOTGpadv7
Failed to load module GeomPainter
Failed to load module GuiHtml
Failed to load module RMySQL
Failed to load module ROOTEve
Failed to load module Cling_Runtime_Extra
Failed to load module RDAVIX
Failed to load module ROOTTPython
Failed to load module HistPainter
Failed to load module XMLIO
Failed to load module MLP
Failed to load module Ged
Failed to load module GuiBld
Failed to load module TMVA
Failed to load module TMVAGui
Failed to load module RooFitCodegen
Failed to load module ROOTWebDisplay
Failed to load module NetxNG
Failed to load module RHTTPSniff
Failed to load module RooFitXRooFit
Failed to load module RGL
Failed to load module Tree
Failed to load module SQLIO
Failed to load module ROOTNTuple
Failed to load module ROOTTMVASofie
Failed to load module ROOTVecOps
Failed to load module RootAuth
Failed to load module EG
Failed to load module Gui
Failed to load module ASImage
Failed to load module ROOT_Config
Failed to load module RooFitJSONInterface
Failed to load module Matrix
Failed to load module Recorder
Failed to load module Gdml
Failed to load module ROOT_Foundation_C
Failed to load module ROOTTreeViewer
Failed to load module MathMore
Failed to load module GenVector
Failed to load module Cling_Runtime
Failed to load module RooFitCore
Failed to load module RooFit
Failed to load module Hist
Failed to load module ROOTNTupleUtil
Failed to load module TreeViewer

*** Break *** segmentation violation
[/usr/lib/system/libsystem_platform.dylib] _sigtramp (no debug info)
(no debug info)
[/usr/local/Cellar/root/6.36.06/lib/root/libCling.so] ROOT::TMetaUtils::TNormalizedCtxtImpl::TNormalizedCtxtImpl(cling::LookupHelper const&) (no debug info)
[/usr/local/Cellar/root/6.36.06/lib/root/libCling.so] ROOT::TMetaUtils::TNormalizedCtxt::TNormalizedCtxt(cling::LookupHelper const&) (no debug info)
[/usr/local/Cellar/root/6.36.06/lib/root/libCling.so] TCling::TCling(char const*, char const*, char const* const*, void*) (no debug info)
[/usr/local/Cellar/root/6.36.06/lib/root/libCling.so] CreateInterpreter (no debug info)
[/usr/local/Cellar/root/6.36.06/lib/root/libCore.so] TROOT::InitInterpreter() (no debug info)
[/usr/local/Cellar/root/6.36.06/lib/root/libCore.so] ROOT::Internal::GetROOT2() (no debug info)
[/usr/local/Cellar/root/6.36.06/lib/root/libCore.so] TApplication::TApplication(char const*, int*, char**, void*, int) (no debug info)
[/usr/local/Cellar/root/6.36.06/lib/root/libRint.so] TRint::TRint(char const*, int*, char**, void*, int, bool, bool) (no debug info)
[/usr/local/Cellar/root/6.36.06/bin/root.exe] main (no debug info)
[/usr/lib/dyld] start (no debug info)
Mac:root jamesbowen$

Does anybody have any suggestions on how to fix this?

James Bowne

couet · January 7, 2026, 1:17pm

Have you tried to install it form sources ?

James_Bowen · January 7, 2026, 9:43pm

Based on your implied recommendation, I went to the instructions for Building from Sources. I then went to Required Dependencies to make sure I was prepared. When I executed the following command:

cmake ../root

the following error occurred, which halted the process:

– Looking for GLEW
– Found GLEW: /usr/local/lib/cmake/glew/glew-config.cmake
CMake Error at cmake/modules/SearchInstalledSoftware.cmake:764 (message):
Please enable builtin Glew due a bug in CMake’s FindGlew < v3.25 (use cmake
option -Dbuiltin_glew=ON).
Call Stack (most recent call first):
CMakeLists.txt:155 (include)

– Configuring incomplete, errors occurred!
See also “/Users/jamesbowen/root/root-build/CMakeFiles/CMakeOutput.log”.
See also “/Users/jamesbowen/root/root-build/CMakeFiles/CMakeError.log”.
Jamess-MacBook-Pro:root-build jamesbowen$

Could this be at least part of my problems? And if so, how does this get corrected?

James

couet · January 8, 2026, 7:47am

Have you tired what the error message recommend ie:
cmake -Dbuiltin_glew=ON ../root ?

James_Bowen · January 13, 2026, 5:15pm

Dear Couet,

Thank you. I followed your recommendation, and that apparently corrected that problem, as I was then able to complete the cmake ../root step. I then proceeded to the next step, make -j8 . Several minutes of installation and building followed, until the following error came up:

*[ 63%] Building CXX object bindings/tpython/CMakeFiles/ROOTTPython.dir/src/TPyArg.cxx.o
ld: warning: ignoring file ‘/opt/local/lib/libxml2.dylib’: found architecture ‘arm64’, required architecture ‘x86_64’
Undefined symbols for architecture x86_64:
“_xmlCleanupParser”, referenced from:
(anonymous namespace)::InitAndCleanupTheXMLParserOnlyOnceCommaEver::~InitAndCleanupTheXMLParserOnlyOnceCommaEver() in TXMLParser.cxx.o
“_xmlCreateFileParserCtxt”, referenced from:
TDOMParser::ParseFile(char const*) in TDOMParser.cxx.o
TSAXParser::ParseFile(char const*) in TSAXParser.cxx.o
“_xmlCreateMemoryParserCtxt”, referenced from:
TDOMParser::ParseBuffer(char const*, int) in TDOMParser.cxx.o
TSAXParser::ParseBuffer(char const*, int) in TSAXParser.cxx.o
“_xmlDocGetRootElement”, referenced from:
TXMLDocument::TXMLDocument(_xmlDoc*) in TXMLDocument.cxx.o
“_xmlFreeDoc”, referenced from:
TXMLDocument::~TXMLDocument() in TXMLDocument.cxx.o
TXMLDocument::~TXMLDocument() in TXMLDocument.cxx.o
TXMLDocument::~TXMLDocument() in TXMLDocument.cxx.o
“_xmlFreeParserCtxt”, referenced from:
TXMLParser::~TXMLParser() in TXMLParser.cxx.o
TXMLParser::ReleaseUnderlying() in TXMLParser.cxx.o
“_xmlInitParser”, referenced from:
__GLOBAL__sub_I_TXMLParser.cxx in TXMLParser.cxx.o
“_xmlParseDocument”, referenced from:
TDOMParser::ParseContext() in TDOMParser.cxx.o
TSAXParser::Parse() in TSAXParser.cxx.o
“_xmlParserGetDirectory”, referenced from:
TDOMParser::ParseFile(char const*) in TDOMParser.cxx.o
“_xmlStopParser”, referenced from:
TXMLParser::StopParser() in TXMLParser.cxx.o
“_xmlStrdup”, referenced from:
TDOMParser::ParseFile(char const*) in TDOMParser.cxx.o
ld: symbol(s) not found for architecture x86_64
c++: error: linker command failed with exit code 1 (use -v to see invocation)
make[2]: *** [lib/libXMLParser.so] Error 1
make[1]: *** [io/xmlparser/CMakeFiles/XMLParser.dir/all] Error 2
make[1]: *** Waiting for unfinished jobs…
[ 63%] Building CXX object net/http/CMakeFiles/RHTTP.dir/src/THttpServer.cxx.o
*

Moments later, after some more building, the process terminated, apparently due to that error:

[ 64%] Linking CXX shared library ../../lib/libNet.so
[ 64%] Built target Net
make: *** [all] Error 2
Jamess-MacBook-Pro:root-build jamesbowen$ -v
-bash: -v: command not found
Jamess-MacBook-Pro:root-build jamesbowen$

Do you have any recommendations on how to correct this error? There’s a comment in there about using some command to see the invocation, but I’m not sure exactly how to do that.

Sincerely,

James

couet · January 14, 2026, 7:09am

It looks like there is some mismatch in the libraries installed on you machine. What is your machine exactly ? a Apple Silicon one ? to be sure you are doing a clen build you can try the following:

cd ~
git clone https://github.com/root-project/root.git root
mkdir build
cd build
cmake -Dbuiltin_glew=ON ../root
make -j8

James_Bowen · January 15, 2026, 12:39am

Oliver,

I have a 2023 MacBook Pro with an Apple M2 Pro chip. The current OS is Tahoe 26.2. I previously installed Root successfully in May 2024 using Homebrew and the instructions for using Homebrew on the root.cern.ch website. However, that installation was apparently broken by an OS upgrade in March 2025, and I have since been unable to reinstall Root.

I also tried what you wrote above. I already had the root and build directories from my attempts to reinstall that I contacting you about. I therefore attempted the

Oliver,

I have a 2023 MacBook Pro with an Apple M2 Pro chip. The current OS is Tahoe 26.2. I previously installed Root successfully in May 2024 using Homebrew and the instructions for using Homebrew on the root.cern.ch website. However, that installation was apparently broken by an OS upgrade in March 2025, and I have since been unable to reinstall Root.

I also tried what you wrote above. I already had the root and build directories from my attempts to reinstall that I contacting you about. I therefore attempted the

cmake -Dbuiltin_glew=ON ../root

step, but it failed. Here is what was said upon failure:

CMake Error in builtins/glew/CMakeLists.txt:
Imported target “OpenGL::GL” includes non-existent path

"/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX15.5.sdk/System/Library/Frameworks/OpenGL.framework"