PyROOT still not working on macOS

ROOT
1

Will be PyROOT available on macOS?
Continuing this topic: PyROOT does not work anymore?

Now installed ROOT 6.38.02 via homebrew.

$ . /opt/homebrew/bin/thisroot.sh

$ cat test_root.py
#!/usr/bin/env python3

import ROOT

$ python3 test_root.py
Traceback (most recent call last):
  File "/Users/USER/test_root.py", line 3, in <module>
    import ROOT
  File "/opt/homebrew/Cellar/root/6.38.02/lib/root/ROOT/__init__.py", line 20, in <module>
    import cppyy
  File "/opt/homebrew/Cellar/root/6.38.02/lib/root/cppyy/__init__.py", line 74, in <module>
    from ._cpython_cppyy import *
  File "/opt/homebrew/Cellar/root/6.38.02/lib/root/cppyy/_cpython_cppyy.py", line 26, in <module>
    import cppyy.libcppyy as _backend
ImportError: dlopen(/opt/homebrew/Cellar/root/6.38.02/lib/root/cppyy/libcppyy.so, 0x0002): symbol not found in flat namespace '_PyUnstable_Object_IsUniqueReferencedTemporary'

ROOT Version: 6.38.02
Platform: macOS

2

The PyUnstable_Object_IsUniqueReferencedTemporary symbol that is not found is only available starting from Python 3.14.

Looks like homebrew is indeed building ROOT against Python 3.14. I guess you need to make sure to use the same Python version.

3

homebrew install python 3.14 bottle but do not use it.
What it the ROOT installation method which guarantees PyROOT work?
Installation from sources still does not work – checked right now.

$ ./test_root.py
Traceback (most recent call last):
  File "/Users/USER/./test_root.py", line 3, in <module>
    import ROOT
  File "/Users/USER/soft/root_install/lib/ROOT/__init__.py", line 25, in <module>
    import cppyy
  File "/Users/USER/soft/root_install/lib/cppyy/__init__.py", line 88, in <module>
    from ._cpython_cppyy import *
  File "/Users/USER/soft/root_install/lib/cppyy/_cpython_cppyy.py", line 24, in <module>
    c = loader.load_cpp_backend()
  File "/Users/USER/soft/root_install/lib/cppyy_backend/loader.py", line 100, in load_cpp_backend
    raise RuntimeError("could not load cppyy_backend library, details:\n%s" %
        '\n'.join(['  '+x for x in err]))
RuntimeError: could not load cppyy_backend library, details:
  dlopen(/Users/USER/soft/root_install/lib/cppyy_backend/lib/libcppyy_backend.so, 0x000A): tried: '/Users/USER/soft/root_install/lib/cppyy_backend/lib/libcppyy_backend.so' (no such file), '/System/Volumes/Preboot/Cryptexes/OS/Users/USER/soft/root_install/lib/cppyy_backend/lib/libcppyy_backend.so' (no such file), '/Users/USER/soft/root_install/lib/cppyy_backend/lib/libcppyy_backend.so' (no such file)
  dlopen(libcppyy_backend.cpython-313-darwin.so, 0x000A): tried: 'libcppyy_backend.cpython-313-darwin.so' (no such file), '/System/Volumes/Preboot/Cryptexes/OSlibcppyy_backend.cpython-313-darwin.so' (no such file), '/usr/lib/libcppyy_backend.cpython-313-darwin.so' (no such file, not in dyld cache), 'libcppyy_backend.cpython-313-darwin.so' (no such file)
  dlopen(libcppyy_backend.so, 0x000A): tried: 'libcppyy_backend.so' (no such file), '/System/Volumes/Preboot/Cryptexes/OSlibcppyy_backend.so' (no such file), '/usr/lib/libcppyy_backend.so' (no such file, not in dyld cache), 'libcppyy_backend.so' (no such file)
  dlopen(/Users/USER/soft/root_install/lib/cppyy_backend/lib/libcppyy_backend.cpython-313-darwin.so, 0x000A): tried: '/Users/USER/soft/root_install/lib/cppyy_backend/lib/libcppyy_backend.cpython-313-darwin.so' (no such file), '/System/Volumes/Preboot/Cryptexes/OS/Users/USER/soft/root_install/lib/cppyy_backend/lib/libcppyy_backend.cpython-313-darwin.so' (no such file), '/Users/USER/soft/root_install/lib/cppyy_backend/lib/libcppyy_backend.cpython-313-darwin.so' (no such file)