ROOT crashing on Mac

ROOT
1

ROOT Version: root_v6.36.04
Platform: MacOS Sequoia 15.7.1
Compiler: clang version 17.0.0 (clang-1700.3.19.1)

Hello,
root is crashing. I was hoping the latest release 6.36.04 would fix this. I am still running Sequoia, but xcode is updated. The binary I am trying to use is root_v6.36.04.macos-15.6-arm64-clang170

Below is the beginning of the error messages. Please let me know if I am doing something wrong.
thank you

/Applications/root_v6.36.04/etc/cling/std_darwin.modulemap:8:63: error: header ‘__type_traits/add_const.h’ not found
module add_const { header “__type_traits/add_const.h” }
^
input_line_1:1:10: note: submodule of top-level module ‘std’ implicitly imported here
#include
^
Warning in cling::IncrementalParser::CheckABICompatibility():
Failed to extract C++ standard library version.
Warning in cling::IncrementalParser::CheckABICompatibility():
Possible C++ standard library mismatch, compiled with _LIBCPP_ABI_VERSION ‘1’
Extraction of runtime standard library version was: ‘’
input_line_2:1:2: fatal error: module file ‘/Users/sftnight/ROOT-CI/build/lib/DarwinFoundation.pcm’ not found: module file not found
#include <cling/Interpreter/RuntimeUniverse.h>
^
input_line_2:1:2: note: imported by module ‘std’ in ‘/Applications/root_v6.36.04/lib/std.pcm’
input_line_2:1:2: note: imported by module ‘Cling_Runtime_Extra’ in ‘/Applications/root_v6.36.04/lib/Cling_Runtime_Extra.pcm’
input_line_2:1:2: note: imported by module ‘Cling_Runtime’ in ‘/Applications/root_v6.36.04/lib/Cling_Runtime.pcm’
<<< cling interactive line includer >>>: fatal error: module file ‘/Users/sftnight/ROOT-CI/build/lib/DarwinFoundation.pcm’ not found: module file not found
<<< cling interactive line includer >>>: note: imported by module ‘Darwin’ in ‘/Applications/root_v6.36.04/lib/Darwin.pcm’

2

Hello Angela,

Sorry for asking this trivial question, but did you install the commandline utils (xcode-select --install)?
If yes, how many old installations do you have around (ls /Library/Developer/CommandLineTools/SDKs/)?

Cheers,
D

3

Hi Danilo

not trivial at all, there have been cases when that was the problem, but unfortunately, that is not the case this time.

Re, older installations: there are a few:
lrwxr-xr-x 1 root wheel 14 Sep 17 08:49 MacOSX.sdk@ → MacOSX26.0.sdk
drwxr-xr-x 7 root wheel 224 Jun 14 2022 MacOSX12.1.sdk/
drwxr-xr-x 3 root wheel 96 Nov 8 2024 MacOSX12.3.sdk/
drwxr-xr-x 7 root wheel 224 Aug 14 20:56 MacOSX15.5.sdk/
lrwxr-xr-x 1 root wheel 14 Sep 17 08:49 MacOSX15.sdk@ → MacOSX15.5.sdk
drwxr-xr-x 7 root wheel 224 Sep 3 20:36 MacOSX26.0.sdk/
lrwxr-xr-x 1 root wheel 14 Sep 17 08:49 MacOSX26.sdk@ → MacOSX26.0.sdk

I should definitely get rid of the two very old ones, for the rest, I wait for your advice.

thank you

Angela

4

Dear Angela,

We encountered before issues with many sdks installed, and we are looking into ways to make ROOT pick the right one.
However, so far, a good solution, has been to remove the old sdks. In your case, a bit different, that would mean to keep only MacOSX15 (and symlink). To avoid potential problems, one might think not to remove entirely, but perhaps move all other sdks into a directory of choice.

Cheers,
D

5

Hi Danilo,

I tried what you said, moved the MacOSX26 sdk to another folder, and created a new link MacOSX.sdk pointing to MacOSX15.5.sdk
I can start root now, but there are still errors, and I cannot even open a TBrowser.
Below is what I get when I launch root

Thank you for your help.

Angela

\~ % root
/Applications/root_v6.36.04/etc/cling/std_darwin.modulemap:8:63: error: header ‘\__type_traits/add_const.h’ not found
module add_const                                 { header “\__type_traits/add_const.h” }
^
input_line_1:1:10: note: submodule of top-level module ‘std’ implicitly imported here
#include
^
Warning in cling::IncrementalParser::CheckABICompatibility():
Failed to extract C++ standard library version.
Warning in cling::IncrementalParser::CheckABICompatibility():
Possible C++ standard library mismatch, compiled with \_LIBCPP_ABI_VERSION ‘1’
Extraction of runtime standard library version was: ‘’

| Welcome to ROOT 6.36.04                        https://root.cern |
| (c) 1995-2025, The ROOT Team; conception: R. Brun, F. Rademakers |
| Built for macosxarm64 on Aug 25 2025, 10:48:12                   |
| From tags/v6-36-04@v6-36-04                                      |
| With Apple clang version 17.0.0 (clang-1700.0.13.5)              |

| Try ‘.help’/‘.?’, ‘.demo’, ‘.license’, ‘.credits’, ‘.quit’/‘.q’ |
|----|
|  |

root \[0\]