lets_plot_kotlin_bridge is unable to locate libc++.1.dylib, I am using Mac m2

[dipunew]

The error message indicates that the lets_plot_kotlin_bridge is still unable to locate libc++.1.dylib.

[alshan]

Interesting, what kind of Python env are you using?

[VDovidaytis-HORIS]

Possible fix of the problem: 241ee55

[dipunew]

@alshan and @VDovidaytis-HORIS

Thank you for your responses. I’m using Python 3.13 with pyenv as my environment.

I’ve also tried the suggested fix (241ee55), but unfortunately, the issue still persists.

[VDovidaytis-HORIS]

Could you provide more details, please:

• full error output
• macOS version
• xcodebuild -version output
• xcode-select -version output
• PyEnv version and how did you install it.

I will try to reproduce the error.

[VDovidaytis-HORIS]

I’ve also tried the suggested fix (241ee55), but unfortunately, the issue still persists.

And let me clarify: how did you try the fix?

[keatingw]

Hi there, just chiming in that I have the same error on an M1 Max Macbook using Python 3.12.4 and lets-plot v4.5.1—hopefully this can help reproduce.

I tried to test the fix posted above but couldn't get Gradle building correctly (though admittedly didn't have much time to troubleshoot robustly).

Details:

• macOS version: 14.7.1
• no xcodebuild install, so xcode-select: error: tool 'xcodebuild' requires Xcode, but active developer directory '/Library/Developer/CommandLineTools' is a command line tools instance
• xcode-select version 2408

I'm using uv to set up an environment and install:

uv venv -p 3.12.4
uv pip install lets-plot
.venv/bin/python -c "from lets_plot import *"

Gives:

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/Users/<user>/Developer/lp-test/.venv/lib/python3.12/site-packages/lets_plot/__init__.py", line 17, in <module>
    from .frontend_context import *
  File "/Users/<user>/Developer/lp-test/.venv/lib/python3.12/site-packages/lets_plot/frontend_context/__init__.py", line 6, in <module>
    from ._configuration import *
  File "/Users/<user>/Developer/lp-test/.venv/lib/python3.12/site-packages/lets_plot/frontend_context/_configuration.py", line 8, in <module>
    from ._html_contexts import _create_html_frontend_context, _use_isolated_frame, _create_wb_html_frontend_context
  File "/Users/<user>/Developer/lp-test/.venv/lib/python3.12/site-packages/lets_plot/frontend_context/_html_contexts.py", line 7, in <module>
    from ._jupyter_notebook_ctx import JupyterNotebookContext
  File "/Users/<user>/Developer/lp-test/.venv/lib/python3.12/site-packages/lets_plot/frontend_context/_jupyter_notebook_ctx.py", line 17, in <module>
    from .. import _kbridge as kbr
  File "/Users/<user>/Developer/lp-test/.venv/lib/python3.12/site-packages/lets_plot/_kbridge.py", line 7, in <module>
    import lets_plot_kotlin_bridge
ImportError: dlopen(/Users/<user>/Developer/lp-test/.venv/lib/python3.12/site-packages/lets_plot_kotlin_bridge.cpython-312-darwin.so, 0x0002): Library not loaded: @rpath/libc++.1.dylib
  Referenced from: <C73BD5C1-9BE6-3DC6-8C81-759A39C12D94> /Users/<user>/Developer/lp-test/.venv/lib/python3.12/site-packages/lets_plot_kotlin_bridge.cpython-312-darwin.so
  Reason: tried: '/Users/vdovidaytis/Applications/miniconda3/envs/py312-arm/lib/libc++.1.dylib' (no such file), '/System/Volumes/Preboot/Cryptexes/OS/Users/vdovidaytis/Applications/miniconda3/envs/py312-arm/lib/libc++.1.dylib' (no such file), '/Users/vdovidaytis/Applications/miniconda3/envs/py312-arm/lib/libc++.1.dylib' (no such file), '/System/Volumes/Preboot/Cryptexes/OS/Users/vdovidaytis/Applications/miniconda3/envs/py312-arm/lib/libc++.1.dylib' (no such file)

Thank you!

[VDovidaytis-HORIS]

@keatingw, hello!

Thank you for your report!

First, let me ask you to try installing the dev wheel from this archive into your environment:

lets_plot-4.5.2.dev1-cp312-cp312-macosx_11_0_arm64.zip

Example:

pip uninstall lets-plot
unzip lets_plot-4.5.2.dev1-cp312-cp312-macosx_11_0_arm64.zip
pip install lets_plot-4.5.2.dev1-cp312-cp312-macosx_11_0_arm64/lets_plot-4.5.2.dev1-cp312-cp312-macosx_11_0_arm64.whl

This Python wheel contains the required fix.

[keatingw]

Confirming that dev wheel works from my end—the import error no longer occurs and I can render the quick start guide example plot. Thank you!

[paupereira]

I have the same problem but when I try the fix suggested by @VDovidaytis-HORIS and run pip install lets_plot-4.5.2.dev1-cp312-cp312-macosx_11_0_arm64/lets_plot-4.5.2.dev1-cp312-cp312-macosx_11_0_arm64.whl , I get the error ERROR: lets_plot-4.5.2.dev1-cp312-cp312-macosx_11_0_arm64.whl is not a supported wheel on this platform.

I'm on a Apple M2 Pro, macOS Sequoia 15.1, using python 3.12.

[VDovidaytis-HORIS]

@paupereira could you please show the output of the following command:

python -c "import platform; print(platform.machine())"

[quickcoffee]

I have the same error as @paupereira (is not a supported wheel on this platform.).
I'm on a Apple M1, macOS 14.5, using python 3.11.0.

could you please show the output of the following command:

@VDovidaytis-HORIS the output is arm64

[VDovidaytis-HORIS]

@quickcoffee this is because you tried to install my wheel, which is built for Python 3.12, on your Python 3.11.

Okay, everyone. We have made a dev release with the required fix for all platforms available on PyPI.org. Please check it out:

pip install lets-plot==4.5.2.dev1

[quickcoffee]

@VDovidaytis-HORIS my bad, thanks!

Can confirm that with 4.5.2.dev1 the error is gone 🥳

[paupereira]

4.5.2.dev1 fixed the issue :D
For the record, python -c "import platform; print(platform.machine())" returns arm64.

[dipunew]

Thank you so much VDovidaytis!. lets-plot==4.5.2.dev1 is working.

[VDovidaytis-HORIS]

Thank you so much VDovidaytis!. lets-plot==4.5.2.dev1 is working.

You're welcome! But keep in mind that this is a dev version — don't forget to update it to the next release.