libgcc-ng, libstdcxx-ng do exist in conda-forge. But they're for Linux only, not for macOS, Windows.

  • conda-forge/libgcc-ng
  • conda-forge/libstdcxx-ng

These two packages include libraries for gcc. For macOS, install gcc with homebrew. They are contained by the gcc package already.

brew install gcc
Answer from Simba on Stack Overflow
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Anaconda.org
anaconda.org › anaconda › libgcc-ng
libgcc-ng - anaconda | Anaconda.org
Install libgcc-ng with Anaconda.org. The GCC low-level runtime library
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Anaconda.org
anaconda.org › conda-forge › libgcc-ng
libgcc-ng - conda-forge | Anaconda.org
Install libgcc-ng with Anaconda.org. The GCC low-level runtime library
Discussions

python - PackagesNotFoundError: The following packages are not available from current channels (libgcc-ng and libstdcxx-ng) - Stack Overflow
I am trying to run the yml file but fail to solve the environment. The error is ResolvePackageNotFound: libgcc-ng libstdcxx-ng Then I tried conda installs conda install -c anaconda libgcc-ng conda More on stackoverflow.com
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python - Snakemake/miniforge: Nothing provides libgcc-ng >=12 needed by freebayes-1.3.6-hbfe0e7f_2 - Stack Overflow
Looking for: ['freebayes=1.3.6'] ... can be installed ... This does not work for me, and you can see from my question that I'm already not in strict mode. But your answer led me to this solution which does work for : yaml name: freebayes channels: - bioconda dependencies: - freebayes=1.3.6 - conda-forge::libgcc-ng I add the ... More on stackoverflow.com
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pymol-open-source -> libgcc-ng[version='>=7.5.0'] -> __glibc[version='>=2.17']
Hi, I encounter an error while installing the Pymol with the following command: conda install -c tpeulen pymol-open-source More on github.com
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1
January 27, 2022
Installation Issue: MOOSE Installation Fails on Linux Ubuntu 22.04.3 as libgcc-ng >=12 does not exist
Installation Issue: MOOSE Installation Fails on Linux Ubuntu 22.04.3 as libgcc-ng >=12 does not exist More on github.com
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Libraries.io
libraries.io › conda › libgcc-ng
libgcc-ng 15.2.0 on conda - Libraries.io - security & maintenance data for open source software
November 28, 2017 - conda install -c anaconda libgcc-ng · Dependencies · 2 · Dependent packages · 4.99K · Dependent repositories · 2.8K · Total releases · 28 · Latest release · Nov 10, 2025 · First release · Nov 28, 2017 · SourceRank · 18 · 15.2.0 ...
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GitHub
github.com › conda-forge › conda-forge.github.io › issues › 763
Cannot install python=3.7 on Linux (libgcc-ng missing?) · Issue #763 · conda-forge/conda-forge.github.io
July 26, 2021 - $ conda create -n test python=3.7 Collecting package metadata: done Solving environment: failed PackagesNotFoundError: The following packages are not available from current channels: - python=3.7 -> libgcc-ng[version='>=7.3.0'] - python=3.7 -> libstdcxx-ng[version='>=7.3.0'] - python=3.7 -> openssl[version='>=1.1.1a,<1.1.2a'] - python=3.7 -> sqlite[version='>=3.26.0,<4.0a0'] - python=3.7 -> tk[version='>=8.6.9,<8.7.0a0'] - python=3.7 -> xz[version='>=5.2.4,<5.3.0a0'] Current channels: - https://conda.anaconda.org/conda-canary/linux-64 - https://conda.anaconda.org/conda-canary/noarch - https://conda.anaconda.org/conda-forge/linux-64 - https://conda.anaconda.org/conda-forge/noarch To search for alternate channels that may provide the conda package you're looking for, navigate to https://anaconda.org and use the search bar at the top of the page.
Author   conda-forge
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Prefix.dev
prefix.dev › channels › conda-forge › packages › libgcc-ng
libgcc-ng - conda-forge
pixi add libgcc-ng · conda install -c https://prefix.dev/conda-forge libgcc-ng · libgcc-ng package does not contain a description · Loading chart data... 15.2.0 · GPL-3.0-only · WITH GCC-exception-3.1 · linux-64 · linux-aarch64 · ...
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Anaconda
anaconda.org › anaconda-org-build › libgcc-ng
libgcc-ng - anaconda-org-build | Anaconda.org
Install libgcc-ng with Anaconda.org. The GCC low-level runtime library
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Anaconda
anaconda.org › kx-build › libgcc-ng
libgcc-ng - kx-build | Anaconda.org
Install libgcc-ng with Anaconda.org. The GCC low-level runtime library
Find elsewhere
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Anaconda
anaconda.org › jjhelmus › libgcc-ng
Libgcc Ng | Anaconda.org
To install this package run one of the following: conda install jjhelmus::libgcc-ngconda install jjhelmus/label/aarch64_bootstrap::libgcc-ngconda install jjhelmus/label/gcc49_toolchain::libgcc-ngconda install jjhelmus/label/gcc54_toolchain::libgcc-ngconda install jjhelmus/label/sles11_cuda...
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Anaconda
anaconda.org › wakari › libgcc-ng
libgcc-ng - wakari | Anaconda.org
Install libgcc-ng with Anaconda.org. The GCC low-level runtime library
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Readthedocs
k2.readthedocs.io › en › latest › installation › conda.html
Install using conda (Linux/macOS/Windows) — k2 1.7 documentation
$ conda create -n foo python=3.7 ... will be INSTALLED: _libgcc_mutex pkgs/main/linux-64::_libgcc_mutex-0.1-main ca-certificates pkgs/main/linux-64::ca-certificates-2021.4.13-h06a4308_1 certifi pkgs/main/linux-64::certifi-2020.12.5-py37h06a4308_0 ld_impl_linux-64 pkgs/main/linux-64::ld_imp...
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Anaconda
anaconda.org › intel › libgcc-ng
Anaconda.org
Find and install packages from Anaconda.org.
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GitHub
github.com › conda › conda-build › issues › 4371
pymol-open-source -> libgcc-ng[version='>=7.5.0'] -> __glibc[version='>=2.17'] · Issue #4371 · conda/conda-build
January 27, 2022 - pymol-open-source -> libgcc-ng[version='>=7.5.0'] -> __glibc[version='>=2.17']#4371 · Copy link · Labels · locked[bot] locked due to inactivity[bot] locked due to inactivity · biotech70 · opened · on Jan 27, 2022 · Issue body actions · Hi, I encounter an error while installing the Pymol with the following command: conda install -c tpeulen pymol-open-source ·
Author   conda
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GitHub
github.com › idaholab › moose › discussions › 26822
Installation Issue: MOOSE Installation Fails on Linux Ubuntu 22.04.3 as libgcc-ng >=12 does not exist · idaholab/moose · Discussion #26822
I have closely followed the installation instructions on the MOOSE website (https://mooseframework.inl.gov/getting_started/installation/conda.html), but I get the following error message when I execute the command conda create -n moose moose-dev=2024.01.23 in my terminal: Channels: - https://conda.software.inl.gov/public - defaults Platform: linux-64 Collecting package metadata (repodata.json): done Solving environment: failed LibMambaUnsatisfiableError: Encountered problems while solving: - nothing provides libgcc-ng >=12 needed by moose-wasp-2023.11.29-build_0 Could not solve for environment specs The following package could not be installed └─ moose-dev 2024.01.23** is not installable because it requires └─ moose-wasp 2023.11.29.* , which requires └─ libgcc-ng >=12 , which does not exist (perhaps a missing channel).
Author   idaholab
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GNU
gcc.gnu.org › onlinedocs › gccint › Libgcc.html
Libgcc (GNU Compiler Collection (GCC) Internals)
GCC provides a low-level runtime library, libgcc.a or libgcc_s.so.1 on some platforms.
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Anaconda Forum
forum.anaconda.com › getting started › how do i...?
Installation issue on Mac osx-64 (libgcc-ng) - How do I...? - Anaconda Forum
December 7, 2022 - Hi I have a package (Chipseq :: Anaconda.org) that requires perl, perl-math-round, grep and gawk to run. All requirements exist for linux-64 and osx-64 (in conda-forge and/or bioconda). Nevertheless the installation fails on osx-64: ResolvePackageNotFound: - libgcc-ng[version='>=11.2.0'] libgcc-ng is not available for osx-64 but I don’t know why the installation fails on osx-64 although all requirements are available for osx-64.
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Anaconda.org
anaconda.org › anaconda › libgcc
libgcc - anaconda | Anaconda.org
anaconda/libgcc · Community · The GCC low-level runtime library · Overview · Files 7 · Labels 1 · Badges · Versions · 15.2.0 · To install this package, run one of the following: $conda install anaconda::libgcc · Monthly · Downloads Updates · Version · 15.2.0 ·
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Bioinformatics Answers
biostars.org › p › 9515454
error of install gencore about libgcc-ng
March 20, 2022 - error of install gencore about libgcc-ng 0 · 0 · Entering edit mode · 4.2 years ago · Tao ▴ 40 · when I use mamba to install gencore ,it has a problem of libgcc, how to solve this problem gencore mamba conda • 841 views · ADD COMMENT • link updated 4.2 years ago by rpolicastro 13k • written 4.2 years ago by Tao ▴ 40 ·