# 3.10.0 MacOS install question

**URL:** <https://discourse.pymc.io/t/3-10-0-macos-install-question/6614>\
**Category:** Questions\
**Created:** [January 18, 2021, 7:05pm UTC](https://discourse.pymc.io/t/3-10-0-macos-install-question/6614 "2021-01-18T19:05:33Z")\
**Posts on this page:** 9\
**Page:** 1

<div class="post-metadata">

**Author:** ![drbenvincent](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.pymc.io/drbenvincent/32/4313_2.png) [@drbenvincent](https://discourse.pymc.io/u/drbenvincent)\
**Post date:** [January 18, 2021, 7:05pm UTC](https://discourse.pymc.io/t/3-10-0-macos-install-question/6614/1 "2021-01-18T19:05:33Z")

</div>

Coming back to PyMC3 after a break caused by too much teaching 😥. I see that we’re now on 3.10.0 - well done to all involved.

I’m totally inept when it comes to keeping everything sorted, so I’m starting with a fresh Anaconda install. Following the MacOS instructions on the wiki, I installed with `conda install -c conda-forge mkl pymc3`. Although that seems to give me pymc3-3.9.3 and theano-1.0.5, not Theano-PyMC. Is that supposed to happen?

In a vein attempt to get something done, I tried to progress with that, but when importing pymc3, I’m met with my nemesis – Theano compilation errors.

Running `conda install -c conda-forge mkl pymc3` seems to be the [recommended install method](https://github.com/pymc-devs/pymc3/wiki/Installation-Guide-(MacOS)), and it seems to be not working as advertised, so just letting you know. Any ideas?

---

<div class="post-metadata">

**Author:** ![ricardoV94](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.pymc.io/ricardov94/32/5775_2.png) [@ricardoV94](https://discourse.pymc.io/u/ricardoV94)\
**Post date:** [January 18, 2021, 7:32pm UTC](https://discourse.pymc.io/t/3-10-0-macos-install-question/6614/2 "2021-01-18T19:32:13Z")

</div>

Do you have an old version of Theano installed? PyMC is now using the forked Theano-pymc, and having both installed can lead to issues. That’s the only thing I know about the new version…

---

<div class="post-metadata">

**Author:** ![fonnesbeck](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.pymc.io/fonnesbeck/32/13_2.png) [@fonnesbeck](https://discourse.pymc.io/u/fonnesbeck)\
**Post date:** [January 18, 2021, 10:05pm UTC](https://discourse.pymc.io/t/3-10-0-macos-install-question/6614/3 "2021-01-18T22:05:39Z")

</div>

Is this Intel hardware or Apple M1? Also, are your Xcode command line tools up to date?

---

<div class="post-metadata">

**Author:** ![twiecki](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.pymc.io/twiecki/32/6930_2.png) [@twiecki](https://discourse.pymc.io/u/twiecki)\
**Post date:** [January 18, 2021, 10:41pm UTC](https://discourse.pymc.io/t/3-10-0-macos-install-question/6614/4 "2021-01-18T22:41:42Z")

</div>

> [@drbenvincent](#):
>
> `conda install -c conda-forge mkl pymc3`

I tried this on my OSX and I get the right version:

```
>>conda create -n pymc3conda
Collecting package metadata (current_repodata.json): done
Solving environment: done

==> WARNING: A newer version of conda exists. <==
  current version: 4.8.5
  latest version: 4.9.2

Please update conda by running

    $ conda update -n base conda

## Package Plan ##

  environment location: /Users/twiecki/miniconda3/envs/pymc3conda

Proceed ([y]/n)? y

Preparing transaction: done
Verifying transaction: done
Executing transaction: done
#
# To activate this environment, use
#
# $ conda activate pymc3conda
#
# To deactivate an active environment, use
#
# $ conda deactivate

(base) --(23:36:25)--(Thomass-MacBook-Pro-3)--(~/projects/pymc )--(master)
>>conda activate pymc3conda
(pymc3conda) --(23:36:30)--(Thomass-MacBook-Pro-3)--(~/projects/pymc )--(master)
>>conda install -c conda-forge mkl pymc3
Collecting package metadata (current_repodata.json): done
Solving environment: failed with initial frozen solve. Retrying with flexible solve.
Solving environment: failed with repodata from current_repodata.json, will retry with next repodata source.
Collecting package metadata (repodata.json): done
Solving environment: done

==> WARNING: A newer version of conda exists. <==
  current version: 4.8.5
  latest version: 4.9.2

Please update conda by running

    $ conda update -n base conda

## Package Plan ##

  environment location: /Users/twiecki/miniconda3/envs/pymc3conda

  added / updated specs:
    - mkl
    - pymc3

The following packages will be downloaded:

    package | build
    ---------------------------|-----------------
    absl-py-0.11.0 | py38h50d1736_0 169 KB conda-forge
    arviz-0.11.0 | pyhd8ed1ab_0 1.4 MB conda-forge
    bzip2-1.0.8 | hc929b4f_4 155 KB conda-forge
    c-ares-1.17.1 | hc929b4f_0 95 KB conda-forge
    cctools_osx-64-949.0.1 | h2f0f38f_19 1.8 MB conda-forge
    certifi-2020.12.5 | py38h50d1736_1 143 KB conda-forge
    cftime-1.3.1 | py38hc7193ba_0 264 KB conda-forge
    curl-7.71.1 | hcb81553_8 131 KB conda-forge
    dill-0.3.3 | pyhd8ed1ab_0 60 KB conda-forge
    freetype-2.10.4 | h4cff582_1 890 KB conda-forge
    hdf4-4.2.13 | h71d84a9_1004 850 KB conda-forge
    hdf5-1.10.6 |nompi_hc5d9132_1114 3.1 MB conda-forge
    jax-0.2.8 | pyhd8ed1ab_0 453 KB conda-forge
    jaxlib-0.1.59 | py38h50d1736_0 37.5 MB conda-forge
    jpeg-9d | hbcb3906_0 250 KB conda-forge
    kiwisolver-1.3.1 | py38hd9c93a9_1 57 KB conda-forge
    krb5-1.17.2 | h60d9502_0 1.2 MB conda-forge
    lcms2-2.11 | h11f7e16_1 387 KB conda-forge
    ld64_osx-64-530 | hea264c1_17 1.3 MB conda-forge
    libblas-3.9.0 | 7_openblas 11 KB conda-forge
    libcblas-3.9.0 | 7_openblas 11 KB conda-forge
    libcxx-11.0.0 | h4c3b8ed_1 1.0 MB conda-forge
    libedit-3.1.20191231 | h0678c8f_2 103 KB conda-forge
    libffi-3.3 | h046ec9c_2 45 KB conda-forge
    libgfortran-5.0.0 |9_3_0_h6c81a4c_16 19 KB conda-forge
    libgfortran5-9.3.0 | h6c81a4c_16 1.7 MB conda-forge
    liblapack-3.9.0 | 7_openblas 11 KB conda-forge
    libllvm11-11.0.1 | h223d4b2_0 22.4 MB conda-forge
    libnetcdf-4.7.4 |nompi_h9d8a93f_107 1.2 MB conda-forge
    libopenblas-0.3.12 |openmp_h54245bb_1 8.8 MB conda-forge
    libpng-1.6.37 | h7cec526_2 313 KB conda-forge
    libtiff-4.2.0 | h355d032_0 639 KB conda-forge
    libwebp-base-1.1.0 | hbcb3906_3 757 KB conda-forge
    llvm-openmp-11.0.1 | h7c73e74_0 268 KB conda-forge
    lz4-c-1.9.3 | h046ec9c_0 155 KB conda-forge
    mako-1.1.4 | pyh44b312d_0 58 KB conda-forge
    markupsafe-1.1.1 | py38h5406a74_3 25 KB conda-forge
    matplotlib-base-3.3.3 | py38hdcc317e_0 6.7 MB conda-forge
    mkl-2020.4 | h08c4f10_301 145.2 MB conda-forge
    ncurses-6.2 | h2e338ed_4 881 KB conda-forge
    netcdf4-1.5.5.1 |nompi_py38h0bc7383_100 441 KB conda-forge
    numpy-1.19.5 | py38h6ced74f_1 5.1 MB conda-forge
    olefile-0.46 | pyh9f0ad1d_1 32 KB conda-forge
    packaging-20.8 | pyhd3deb0d_0 34 KB conda-forge
    pandas-1.2.0 | py38he9f00de_1 10.6 MB conda-forge
    pillow-8.1.0 | py38hc1d52f7_1 646 KB conda-forge
    pip-20.3.3 | pyhd8ed1ab_0 1.1 MB conda-forge
    pygpu-0.7.6 |py38hc7193ba_1002 604 KB conda-forge
    pymc3-3.10.0 | pyhd8ed1ab_0 1.4 MB conda-forge
    python-3.8.6 |h624753d_4_cpython 12.4 MB conda-forge
    python-flatbuffers-1.11 | py_0 18 KB conda-forge
    pytz-2020.5 | pyhd8ed1ab_0 244 KB conda-forge
    scipy-1.6.0 | py38h95ea19e_0 18.5 MB conda-forge
    setuptools-49.6.0 | py38h50d1736_3 931 KB conda-forge
    sqlite-3.34.0 | h17101e1_0 1.7 MB conda-forge
    tapi-1100.0.11 | h9ce4665_0 196 KB conda-forge
    theano-pymc-1.0.11 | py38hf416894_0 3.6 MB conda-forge
    tk-8.6.10 | h0419947_1 3.3 MB conda-forge
    tornado-6.1 | py38h5406a74_1 643 KB conda-forge
    typing-extensions-3.7.4.3 | 0 8 KB conda-forge
    typing_extensions-3.7.4.3 | py_0 25 KB conda-forge
    wheel-0.36.2 | pyhd3deb0d_0 31 KB conda-forge
    xarray-0.16.2 | pyhd8ed1ab_0 546 KB conda-forge
    zstd-1.4.8 | hf387650_1 870 KB conda-forge
    ------------------------------------------------------------
                                           Total: 303.1 MB

The following NEW packages will be INSTALLED:

  absl-py conda-forge/osx-64::absl-py-0.11.0-py38h50d1736_0
  arviz conda-forge/noarch::arviz-0.11.0-pyhd8ed1ab_0
  bzip2 conda-forge/osx-64::bzip2-1.0.8-hc929b4f_4
  c-ares conda-forge/osx-64::c-ares-1.17.1-hc929b4f_0
  ca-certificates conda-forge/osx-64::ca-certificates-2020.12.5-h033912b_0
  cctools_osx-64 conda-forge/osx-64::cctools_osx-64-949.0.1-h2f0f38f_19
  certifi conda-forge/osx-64::certifi-2020.12.5-py38h50d1736_1
  cftime conda-forge/osx-64::cftime-1.3.1-py38hc7193ba_0
  clang conda-forge/osx-64::clang-10.0.1-default_hf57f61e_1
  clang_osx-64 conda-forge/osx-64::clang_osx-64-10.0.1-h05bbb7f_10
  clangxx conda-forge/osx-64::clangxx-10.0.1-default_hf57f61e_1
  clangxx_osx-64 conda-forge/osx-64::clangxx_osx-64-10.0.1-h05bbb7f_10
  compiler-rt conda-forge/osx-64::compiler-rt-10.0.1-he6db49b_0
  compiler-rt_osx-64 conda-forge/noarch::compiler-rt_osx-64-10.0.1-h033240e_0
  curl conda-forge/osx-64::curl-7.71.1-hcb81553_8
  cycler conda-forge/noarch::cycler-0.10.0-py_2
  dill conda-forge/noarch::dill-0.3.3-pyhd8ed1ab_0
  fastprogress conda-forge/noarch::fastprogress-1.0.0-py_0
  freetype conda-forge/osx-64::freetype-2.10.4-h4cff582_1
  hdf4 conda-forge/osx-64::hdf4-4.2.13-h71d84a9_1004
  hdf5 conda-forge/osx-64::hdf5-1.10.6-nompi_hc5d9132_1114
  jax conda-forge/noarch::jax-0.2.8-pyhd8ed1ab_0
  jaxlib conda-forge/osx-64::jaxlib-0.1.59-py38h50d1736_0
  jpeg conda-forge/osx-64::jpeg-9d-hbcb3906_0
  kiwisolver conda-forge/osx-64::kiwisolver-1.3.1-py38hd9c93a9_1
  krb5 conda-forge/osx-64::krb5-1.17.2-h60d9502_0
  lcms2 conda-forge/osx-64::lcms2-2.11-h11f7e16_1
  ld64_osx-64 conda-forge/osx-64::ld64_osx-64-530-hea264c1_17
  ldid conda-forge/osx-64::ldid-2.1.2-h7660a38_2
  libblas conda-forge/osx-64::libblas-3.9.0-7_openblas
  libcblas conda-forge/osx-64::libcblas-3.9.0-7_openblas
  libclang-cpp10 conda-forge/osx-64::libclang-cpp10-10.0.1-default_hf57f61e_1
  libcurl conda-forge/osx-64::libcurl-7.71.1-h9bf37e3_8
  libcxx conda-forge/osx-64::libcxx-11.0.0-h4c3b8ed_1
  libedit conda-forge/osx-64::libedit-3.1.20191231-h0678c8f_2
  libev conda-forge/osx-64::libev-4.33-haf1e3a3_1
  libffi conda-forge/osx-64::libffi-3.3-h046ec9c_2
  libgfortran conda-forge/osx-64::libgfortran-5.0.0-9_3_0_h6c81a4c_16
  libgfortran5 conda-forge/osx-64::libgfortran5-9.3.0-h6c81a4c_16
  libgpuarray conda-forge/osx-64::libgpuarray-0.7.6-h1de35cc_1003
  liblapack conda-forge/osx-64::liblapack-3.9.0-7_openblas
  libllvm10 conda-forge/osx-64::libllvm10-10.0.1-h009f743_3
  libllvm11 conda-forge/osx-64::libllvm11-11.0.1-h223d4b2_0
  libnetcdf conda-forge/osx-64::libnetcdf-4.7.4-nompi_h9d8a93f_107
  libnghttp2 conda-forge/osx-64::libnghttp2-1.41.0-h7580e61_2
  libopenblas conda-forge/osx-64::libopenblas-0.3.12-openmp_h54245bb_1
  libpng conda-forge/osx-64::libpng-1.6.37-h7cec526_2
  libssh2 conda-forge/osx-64::libssh2-1.9.0-h8a08a2b_5
  libtiff conda-forge/osx-64::libtiff-4.2.0-h355d032_0
  libwebp-base conda-forge/osx-64::libwebp-base-1.1.0-hbcb3906_3
  llvm-openmp conda-forge/osx-64::llvm-openmp-11.0.1-h7c73e74_0
  llvm-tools conda-forge/osx-64::llvm-tools-10.0.1-h1341992_3
  lz4-c conda-forge/osx-64::lz4-c-1.9.3-h046ec9c_0
  mako conda-forge/noarch::mako-1.1.4-pyh44b312d_0
  markupsafe conda-forge/osx-64::markupsafe-1.1.1-py38h5406a74_3
  matplotlib-base conda-forge/osx-64::matplotlib-base-3.3.3-py38hdcc317e_0
  mkl conda-forge/osx-64::mkl-2020.4-h08c4f10_301
  ncurses conda-forge/osx-64::ncurses-6.2-h2e338ed_4
  netcdf4 conda-forge/osx-64::netcdf4-1.5.5.1-nompi_py38h0bc7383_100
  numpy conda-forge/osx-64::numpy-1.19.5-py38h6ced74f_1
  olefile conda-forge/noarch::olefile-0.46-pyh9f0ad1d_1
  openssl conda-forge/osx-64::openssl-1.1.1i-h35c211d_0
  opt_einsum conda-forge/noarch::opt_einsum-3.3.0-py_0
  packaging conda-forge/noarch::packaging-20.8-pyhd3deb0d_0
  pandas conda-forge/osx-64::pandas-1.2.0-py38he9f00de_1
  patsy conda-forge/noarch::patsy-0.5.1-py_0
  pillow conda-forge/osx-64::pillow-8.1.0-py38hc1d52f7_1
  pip conda-forge/noarch::pip-20.3.3-pyhd8ed1ab_0
  pygpu conda-forge/osx-64::pygpu-0.7.6-py38hc7193ba_1002
  pymc3 conda-forge/noarch::pymc3-3.10.0-pyhd8ed1ab_0
  pyparsing conda-forge/noarch::pyparsing-2.4.7-pyh9f0ad1d_0
  python conda-forge/osx-64::python-3.8.6-h624753d_4_cpython
  python-dateutil conda-forge/noarch::python-dateutil-2.8.1-py_0
  python-flatbuffers conda-forge/noarch::python-flatbuffers-1.11-py_0
  python_abi conda-forge/osx-64::python_abi-3.8-1_cp38
  pytz conda-forge/noarch::pytz-2020.5-pyhd8ed1ab_0
  readline conda-forge/osx-64::readline-8.0-h0678c8f_2
  scipy conda-forge/osx-64::scipy-1.6.0-py38h95ea19e_0
  setuptools conda-forge/osx-64::setuptools-49.6.0-py38h50d1736_3
  six conda-forge/noarch::six-1.15.0-pyh9f0ad1d_0
  sqlite conda-forge/osx-64::sqlite-3.34.0-h17101e1_0
  tapi conda-forge/osx-64::tapi-1100.0.11-h9ce4665_0
  theano-pymc conda-forge/osx-64::theano-pymc-1.0.11-py38hf416894_0
  tk conda-forge/osx-64::tk-8.6.10-h0419947_1
  tornado conda-forge/osx-64::tornado-6.1-py38h5406a74_1
  typing-extensions conda-forge/noarch::typing-extensions-3.7.4.3-0
  typing_extensions conda-forge/noarch::typing_extensions-3.7.4.3-py_0
  wheel conda-forge/noarch::wheel-0.36.2-pyhd3deb0d_0
  xarray conda-forge/noarch::xarray-0.16.2-pyhd8ed1ab_0
  xz conda-forge/osx-64::xz-5.2.5-haf1e3a3_1
  zlib conda-forge/osx-64::zlib-1.2.11-h7795811_1010
  zstd conda-forge/osx-64::zstd-1.4.8-hf387650_1

```

---

<div class="post-metadata">

**Author:** ![rpgoldman](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.pymc.io/rpgoldman/32/1800_2.png) [@rpgoldman](https://discourse.pymc.io/u/rpgoldman)\
**Post date:** [January 19, 2021, 12:39am UTC](https://discourse.pymc.io/t/3-10-0-macos-install-question/6614/5 "2021-01-19T00:39:19Z")

</div>

@drbenvincent What I did was checkout the pymc3 repo and build a conda environment using its `conda-envs/environment-dev-py38.yml` (note that you don’t have to check out the repo to do this – you could just download that one file from the github repo).

With that conda environment set up, I then did

`pip install theano-pymc` – to make sure I didn’t get the stock version of Theano.

then

`pip install pymc3`

That worked for me. Installing with `pip` alone – without setting up the conda environment – just gave me all kinds of cryptic errors when Theano tried to compile my PyMC3 models. There’s deep magic in there with clang and mkl, and I really don’t want to think about it!

Hope that helps.

---

<div class="post-metadata">

**Author:** ![drbenvincent](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.pymc.io/drbenvincent/32/4313_2.png) [@drbenvincent](https://discourse.pymc.io/u/drbenvincent)\
**Post date:** [January 19, 2021, 11:49am UTC](https://discourse.pymc.io/t/3-10-0-macos-install-question/6614/6 "2021-01-19T11:49:05Z")

</div>

This is on an intel iMac.

That is very odd… following the exact steps of @twiecki I’m getting the wrong version of pymc3.

```auto
(base) benjamv@x86_64-apple-darwin13 ~ % conda create -n pymc3conda
Collecting package metadata (current_repodata.json): done
Solving environment: done

## Package Plan ##

  environment location: /Users/benjamv/opt/anaconda3/envs/pymc3conda

Proceed ([y]/n)? y

Preparing transaction: done
Verifying transaction: done
Executing transaction: done
#
# To activate this environment, use
#
# $ conda activate pymc3conda
#
# To deactivate an active environment, use
#
# $ conda deactivate

(base) benjamv@x86_64-apple-darwin13 ~ % conda activate pymc3conda
(pymc3conda) benjamv@x86_64-apple-darwin13 ~ % 
(pymc3conda) benjamv@x86_64-apple-darwin13 ~ % conda install -c conda-forge mkl pymc3
Collecting package metadata (current_repodata.json): done
Solving environment: done

## Package Plan ##

  environment location: /Users/benjamv/opt/anaconda3/envs/pymc3conda

  added / updated specs:
    - mkl
    - pymc3

The following packages will be downloaded:

    package | build
    ---------------------------|-----------------
    bzip2-1.0.8 | hc929b4f_4 155 KB conda-forge
    c-ares-1.17.1 | hc929b4f_0 95 KB conda-forge
    ca-certificates-2020.12.5 | h033912b_0 138 KB conda-forge
    certifi-2020.12.5 | py38h50d1736_1 143 KB conda-forge
    curl-7.71.1 | hcb81553_8 131 KB conda-forge
    cycler-0.10.0 | py_2 9 KB conda-forge
    freetype-2.10.4 | h4cff582_1 890 KB conda-forge
    h5py-2.10.0 |nompi_py38h106b333_102 1022 KB conda-forge
    hdf4-4.2.13 | h71d84a9_1004 850 KB conda-forge
    hdf5-1.10.5 |nompi_h0cbb7df_1103 2.7 MB conda-forge
    jpeg-9d | hbcb3906_0 250 KB conda-forge
    kiwisolver-1.3.1 | py38hd9c93a9_1 57 KB conda-forge
    krb5-1.17.2 | h60d9502_0 1.2 MB conda-forge
    lcms2-2.11 | h11f7e16_1 387 KB conda-forge
    libcurl-7.71.1 | h9bf37e3_8 297 KB conda-forge
    libcxx-11.0.0 | h4c3b8ed_1 1.0 MB conda-forge
    libedit-3.1.20191231 | h0678c8f_2 103 KB conda-forge
    libev-4.33 | haf1e3a3_1 99 KB conda-forge
    libffi-3.3 | h046ec9c_2 45 KB conda-forge
    libgfortran-3.0.1 | 0 495 KB conda-forge
    libllvm10-10.0.1 | h009f743_3 20.8 MB conda-forge
    libnetcdf-4.7.4 |nompi_he461dc0_101 1.2 MB conda-forge
    libnghttp2-1.41.0 | h7580e61_2 831 KB conda-forge
    libpng-1.6.37 | h7cec526_2 313 KB conda-forge
    libssh2-1.9.0 | h8a08a2b_5 214 KB conda-forge
    libtiff-4.2.0 | h355d032_0 639 KB conda-forge
    libwebp-base-1.1.0 | hbcb3906_3 757 KB conda-forge
    lz4-c-1.9.3 | h046ec9c_0 155 KB conda-forge
    markupsafe-1.1.1 | py38h5406a74_3 25 KB conda-forge
    matplotlib-base-3.3.3 | py38hdcc317e_0 6.7 MB conda-forge
    mkl-2019.5 | 281 158.1 MB conda-forge
    mkl-service-2.3.0 | py38h0b31af3_0 46 KB conda-forge
    ncurses-6.2 | h2e338ed_4 881 KB conda-forge
    netcdf4-1.5.3 |nompi_py38h645dd01_103 495 KB conda-forge
    olefile-0.46 | pyh9f0ad1d_1 32 KB conda-forge
    openssl-1.1.1i | h35c211d_0 1.9 MB conda-forge
    packaging-20.8 | pyhd3deb0d_0 34 KB conda-forge
    pandas-1.2.0 | py38he9f00de_1 10.6 MB conda-forge
    patsy-0.5.1 | py_0 187 KB conda-forge
    pillow-8.1.0 | py38hc1d52f7_1 646 KB conda-forge
    pip-20.3.3 | pyhd8ed1ab_0 1.1 MB conda-forge
    pyparsing-2.4.7 | pyh9f0ad1d_0 60 KB conda-forge
    python-3.8.6 |h624753d_4_cpython 12.4 MB conda-forge
    python-dateutil-2.8.1 | py_0 220 KB conda-forge
    pytz-2020.5 | pyhd8ed1ab_0 244 KB conda-forge
    readline-8.0 | h0678c8f_2 255 KB conda-forge
    setuptools-49.6.0 | py38h50d1736_3 931 KB conda-forge
    six-1.15.0 | pyh9f0ad1d_0 14 KB conda-forge
    sqlite-3.34.0 | h17101e1_0 1.7 MB conda-forge
    tk-8.6.10 | h0419947_1 3.3 MB conda-forge
    tornado-6.1 | py38h5406a74_1 643 KB conda-forge
    tqdm-4.56.0 | pyhd8ed1ab_0 76 KB conda-forge
    typing_extensions-3.7.4.3 | py_0 25 KB conda-forge
    wheel-0.36.2 | pyhd3deb0d_0 31 KB conda-forge
    xz-5.2.5 | haf1e3a3_1 228 KB conda-forge
    zlib-1.2.11 | h7795811_1010 102 KB conda-forge
    zstd-1.4.8 | hf387650_1 870 KB conda-forge
    ------------------------------------------------------------
                                           Total: 236.5 MB

The following NEW packages will be INSTALLED:

  arviz conda-forge/noarch::arviz-0.11.0-pyhd8ed1ab_0
  blas pkgs/main/osx-64::blas-1.0-mkl
  bzip2 conda-forge/osx-64::bzip2-1.0.8-hc929b4f_4
  c-ares conda-forge/osx-64::c-ares-1.17.1-hc929b4f_0
  ca-certificates conda-forge/osx-64::ca-certificates-2020.12.5-h033912b_0
  cctools conda-forge/osx-64::cctools-949.0.1-h22b1bf0_1
  cctools_osx-64 conda-forge/osx-64::cctools_osx-64-949.0.1-h5ba7a2e_1
  certifi conda-forge/osx-64::certifi-2020.12.5-py38h50d1736_1
  cftime conda-forge/osx-64::cftime-1.3.1-py38hc7193ba_0
  clang pkgs/main/osx-64::clang-10.0.0-default_hf57f61e_0
  clang_osx-64 pkgs/main/osx-64::clang_osx-64-10.0.0-h05bbb7f_0
  clangxx pkgs/main/osx-64::clangxx-10.0.0-default_hf57f61e_0
  clangxx_osx-64 pkgs/main/osx-64::clangxx_osx-64-10.0.0-h05bbb7f_1
  compiler-rt pkgs/main/osx-64::compiler-rt-10.0.0-h47ead80_0
  compiler-rt_osx-64 pkgs/main/noarch::compiler-rt_osx-64-10.0.0-hbcc88fd_0
  curl conda-forge/osx-64::curl-7.71.1-hcb81553_8
  cycler conda-forge/noarch::cycler-0.10.0-py_2
  fastprogress conda-forge/noarch::fastprogress-1.0.0-py_0
  freetype conda-forge/osx-64::freetype-2.10.4-h4cff582_1
  h5py conda-forge/osx-64::h5py-2.10.0-nompi_py38h106b333_102
  hdf4 conda-forge/osx-64::hdf4-4.2.13-h71d84a9_1004
  hdf5 conda-forge/osx-64::hdf5-1.10.5-nompi_h0cbb7df_1103
  jpeg conda-forge/osx-64::jpeg-9d-hbcb3906_0
  kiwisolver conda-forge/osx-64::kiwisolver-1.3.1-py38hd9c93a9_1
  krb5 conda-forge/osx-64::krb5-1.17.2-h60d9502_0
  lcms2 conda-forge/osx-64::lcms2-2.11-h11f7e16_1
  ld64 conda-forge/osx-64::ld64-530-1
  ld64_osx-64 conda-forge/osx-64::ld64_osx-64-530-h3c32e8a_1
  libcurl conda-forge/osx-64::libcurl-7.71.1-h9bf37e3_8
  libcxx conda-forge/osx-64::libcxx-11.0.0-h4c3b8ed_1
  libedit conda-forge/osx-64::libedit-3.1.20191231-h0678c8f_2
  libev conda-forge/osx-64::libev-4.33-haf1e3a3_1
  libffi conda-forge/osx-64::libffi-3.3-h046ec9c_2
  libgfortran conda-forge/osx-64::libgfortran-3.0.1-0
  libgpuarray conda-forge/osx-64::libgpuarray-0.7.6-h1de35cc_1003
  libllvm10 conda-forge/osx-64::libllvm10-10.0.1-h009f743_3
  libnetcdf conda-forge/osx-64::libnetcdf-4.7.4-nompi_he461dc0_101
  libnghttp2 conda-forge/osx-64::libnghttp2-1.41.0-h7580e61_2
  libpng conda-forge/osx-64::libpng-1.6.37-h7cec526_2
  libssh2 conda-forge/osx-64::libssh2-1.9.0-h8a08a2b_5
  libtiff conda-forge/osx-64::libtiff-4.2.0-h355d032_0
  libwebp-base conda-forge/osx-64::libwebp-base-1.1.0-hbcb3906_3
  llvm-openmp pkgs/main/osx-64::llvm-openmp-10.0.0-h28b9765_0
  lz4-c conda-forge/osx-64::lz4-c-1.9.3-h046ec9c_0
  mako conda-forge/noarch::mako-1.1.4-pyh44b312d_0
  markupsafe conda-forge/osx-64::markupsafe-1.1.1-py38h5406a74_3
  matplotlib-base conda-forge/osx-64::matplotlib-base-3.3.3-py38hdcc317e_0
  mkl conda-forge/osx-64::mkl-2019.5-281
  mkl-service conda-forge/osx-64::mkl-service-2.3.0-py38h0b31af3_0
  mkl_fft pkgs/main/osx-64::mkl_fft-1.2.0-py38hc64f4ea_0
  mkl_random pkgs/main/osx-64::mkl_random-1.1.1-py38h959d312_0
  ncurses conda-forge/osx-64::ncurses-6.2-h2e338ed_4
  netcdf4 conda-forge/osx-64::netcdf4-1.5.3-nompi_py38h645dd01_103
  numpy pkgs/main/osx-64::numpy-1.19.2-py38h456fd55_0
  numpy-base pkgs/main/osx-64::numpy-base-1.19.2-py38hcfb5961_0
  olefile conda-forge/noarch::olefile-0.46-pyh9f0ad1d_1
  openssl conda-forge/osx-64::openssl-1.1.1i-h35c211d_0
  packaging conda-forge/noarch::packaging-20.8-pyhd3deb0d_0
  pandas conda-forge/osx-64::pandas-1.2.0-py38he9f00de_1
  patsy conda-forge/noarch::patsy-0.5.1-py_0
  pillow conda-forge/osx-64::pillow-8.1.0-py38hc1d52f7_1
  pip conda-forge/noarch::pip-20.3.3-pyhd8ed1ab_0
  pygpu conda-forge/osx-64::pygpu-0.7.6-py38hc7193ba_1002
  pymc3 conda-forge/noarch::pymc3-3.9.3-py_1
  pyparsing conda-forge/noarch::pyparsing-2.4.7-pyh9f0ad1d_0
  python conda-forge/osx-64::python-3.8.6-h624753d_4_cpython
  python-dateutil conda-forge/noarch::python-dateutil-2.8.1-py_0
  python_abi conda-forge/osx-64::python_abi-3.8-1_cp38
  pytz conda-forge/noarch::pytz-2020.5-pyhd8ed1ab_0
  readline conda-forge/osx-64::readline-8.0-h0678c8f_2
  scipy pkgs/main/osx-64::scipy-1.5.2-py38h2515648_0
  setuptools conda-forge/osx-64::setuptools-49.6.0-py38h50d1736_3
  six conda-forge/noarch::six-1.15.0-pyh9f0ad1d_0
  sqlite conda-forge/osx-64::sqlite-3.34.0-h17101e1_0
  tapi conda-forge/osx-64::tapi-1000.10.8-h879752b_4
  theano conda-forge/osx-64::theano-1.0.5-py38hf416894_1
  tk conda-forge/osx-64::tk-8.6.10-h0419947_1
  tornado conda-forge/osx-64::tornado-6.1-py38h5406a74_1
  tqdm conda-forge/noarch::tqdm-4.56.0-pyhd8ed1ab_0
  typing-extensions conda-forge/noarch::typing-extensions-3.7.4.3-0
  typing_extensions conda-forge/noarch::typing_extensions-3.7.4.3-py_0
  wheel conda-forge/noarch::wheel-0.36.2-pyhd3deb0d_0
  xarray conda-forge/noarch::xarray-0.16.2-pyhd8ed1ab_0
  xz conda-forge/osx-64::xz-5.2.5-haf1e3a3_1
  zlib conda-forge/osx-64::zlib-1.2.11-h7795811_1010
  zstd conda-forge/osx-64::zstd-1.4.8-hf387650_1

```

So I bailed on installing that and tried what @rpgoldman suggests…  
In that new environment I did `pip install theano-pymc` and then `pip install pymc3` and I get pymc3 3.10.0. Have successfully fitted an example model… no Theano headaches.

---

<div class="post-metadata">

**Author:** ![fonnesbeck](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.pymc.io/fonnesbeck/32/13_2.png) [@fonnesbeck](https://discourse.pymc.io/u/fonnesbeck)\
**Post date:** [January 19, 2021, 3:23pm UTC](https://discourse.pymc.io/t/3-10-0-macos-install-question/6614/7 "2021-01-19T15:23:49Z")

</div>

Interesting. We have not had other users report this, but I will add this information to our install instructions incase others find it helpful.

---

<div class="post-metadata">

**Author:** ![drbenvincent](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.pymc.io/drbenvincent/32/4313_2.png) [@drbenvincent](https://discourse.pymc.io/u/drbenvincent)\
**Post date:** [January 19, 2021, 3:48pm UTC](https://discourse.pymc.io/t/3-10-0-macos-install-question/6614/8 "2021-01-19T15:48:47Z")

</div>

To clarify, I only did those two pip install instructions in a fresh environment in a fresh anaconda install.

---

<div class="post-metadata">

**Author:** ![rpgoldman](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.pymc.io/rpgoldman/32/1800_2.png) [@rpgoldman](https://discourse.pymc.io/u/rpgoldman)\
**Post date:** [February 17, 2021, 11:01pm UTC](https://discourse.pymc.io/t/3-10-0-macos-install-question/6614/9 "2021-02-17T23:01:47Z")

</div>

That looks very much like what I was seeing, and I note that in your transcript conda is going to install `theano` instead of `theano-pymc`.

That aligns with my experience, where I added `theano-pymc` manually, removed `theano` and `conda` removed `pymc3`.

My only guess is that something is going wrong with the replacement of `theano` by `theano-pymc`.