[Bug]: Pip Install Does not Work on Mac

[ThilakShekharShriyan]

Describe the bug

While trying out the pip install from the toml file.

Steps/Code to Reproduce

(env) spartan@MLK-SCS-C02GL3N6Q05N FlowerHackathon % flwr new flower-tutorial --framework pytorch --username flwrlabs
/Users/spartan/Desktop/Projects/FlowerHackathon/env/lib/python3.9/site-packages/urllib3/init.py:35: NotOpenSSLWarning: urllib3 v2 only supports OpenSSL 1.1.1+, currently the 'ssl' module is compiled with 'LibreSSL 2.8.3'. See: urllib3/urllib3#3020
warnings.warn(

🔨 Creating Flower App flower-tutorial...
🎊 Flower App creation successful.

To run your Flower App, first install its dependencies:

    cd flower-tutorial && pip install -e .

then, run the app:

    flwr run .

💡 Check the README in your app directory to learn how to
customize it and how to run it using the Deployment Runtime.

(env) spartan@MLK-SCS-C02GL3N6Q05N FlowerHackathon % cd flower-tutorial
pip install -e .
ERROR: File "setup.py" or "setup.cfg" not found. Directory cannot be installed in editable mode: /Users/spartan/Desktop/Projects/FlowerHackathon/flower-tutorial
(A "pyproject.toml" file was found, but editable mode currently requires a setuptools-based build.)
WARNING: You are using pip version 21.2.4; however, version 25.2 is available.
You should consider upgrading via the '/Users/spartan/Desktop/Projects/FlowerHackathon/env/bin/python3 -m pip install --upgrade pip' command.
(env) spartan@MLK-SCS-C02GL3N6Q05N flower-tutorial % pip install .
Processing /Users/spartan/Desktop/Projects/FlowerHackathon/flower-tutorial
DEPRECATION: A future pip version will change local packages to be built in-place without first copying to a temporary directory. We recommend you use --use-feature=in-tree-build to test your packages with this new behavior before it becomes the default.
pip 21.3 will remove support for this functionality. You can find discussion regarding this at pypa/pip#7555.
Installing build dependencies ... done
Getting requirements to build wheel ... done
Preparing wheel metadata ... done
Collecting torchvision==0.22.1
Downloading torchvision-0.22.1-cp39-cp39-macosx_11_0_arm64.whl (1.9 MB)
|████████████████████████████████| 1.9 MB 7.2 MB/s
Collecting flwr-datasets[vision]>=0.5.0
Downloading flwr_datasets-0.5.0-py3-none-any.whl (87 kB)
|

Expected Results

Install Successfully

Actual Results

Errors out

ERROR: File "setup.py" or "setup.cfg" not found. Directory cannot be installed in editable mode: /Users/spartan/Desktop/Projects/FlowerHackathon/flower-tutorial
(A "pyproject.toml" file was found, but editable mode currently requires a setuptools-based build.)
WARNING: You are using pip version 21.2.4; however, version 25.2 is available.
You should consider upgrading via the '/Users/spartan/Desktop/Projects/FlowerHackathon/env/bin/python3 -m pip install --upgrade pip' command.

[ThilakShekharShriyan]

Used pip install . to fix it

[jafermarq]

Hi @ThilakShekharShriyan , so you got it working in the end?

[ThilakShekharShriyan]

no, i had to use "pip install ." instead of "pip install -e ."

[ThilakShekharShriyan]

(env) spartan@MLK-SCS-C02GL3N6Q05N FlowerHackthonDecentralizedProject % pip install flwr
Collecting flwr
Using cached flwr-1.21.0-py3-none-any.whl (664 kB)
Collecting grpcio-health-checking<2.0.0,>=1.62.3
Downloading grpcio_health_checking-1.75.0-py3-none-any.whl (18 kB)
Collecting pathspec<0.13.0,>=0.12.1
Using cached pathspec-0.12.1-py3-none-any.whl (31 kB)
Collecting pycryptodome<4.0.0,>=3.18.0
Using cached pycryptodome-3.23.0-cp37-abi3-macosx_10_9_universal2.whl (2.5 MB)
Collecting requests<3.0.0,>=2.31.0
Using cached requests-2.32.5-py3-none-any.whl (64 kB)
Collecting tomli-w<2.0.0,>=1.0.0
Using cached tomli_w-1.2.0-py3-none-any.whl (6.7 kB)
Collecting numpy<3.0.0,>=1.26.0
Using cached numpy-2.0.2-cp39-cp39-macosx_14_0_arm64.whl (5.3 MB)
Collecting pyyaml<7.0.0,>=6.0.2
Using cached PyYAML-6.0.2-cp39-cp39-macosx_11_0_arm64.whl (172 kB)
Collecting rich<14.0.0,>=13.5.0
Using cached rich-13.9.4-py3-none-any.whl (242 kB)
Collecting grpcio!=1.65.0,<2.0.0,>=1.62.3
Downloading grpcio-1.75.0-cp39-cp39-macosx_11_0_universal2.whl (11.5 MB)
|████████████████████████████████| 11.5 MB 4.7 MB/s
Collecting cryptography<45.0.0,>=44.0.1
Using cached cryptography-44.0.3-cp39-abi3-macosx_10_9_universal2.whl (6.7 MB)
Collecting tomli<3.0.0,>=2.0.1
Using cached tomli-2.2.1-py3-none-any.whl (14 kB)
Collecting protobuf<5.0.0,>=4.21.6
Using cached protobuf-4.25.8-cp37-abi3-macosx_10_9_universal2.whl (394 kB)
Collecting iterators<0.0.3,>=0.0.2
Using cached iterators-0.0.2-py3-none-any.whl (3.9 kB)
Collecting click<8.2.0
Using cached click-8.1.8-py3-none-any.whl (98 kB)
Collecting typer<0.13.0,>=0.12.5
Using cached typer-0.12.5-py3-none-any.whl (47 kB)
Collecting cffi>=1.12
Using cached cffi-2.0.0-cp39-cp39-macosx_11_0_arm64.whl (180 kB)
Collecting pycparser
Using cached pycparser-2.23-py3-none-any.whl (118 kB)
Collecting typing-extensions~=4.12
Using cached typing_extensions-4.15.0-py3-none-any.whl (44 kB)
Collecting grpcio-health-checking<2.0.0,>=1.62.3
Using cached grpcio_health_checking-1.74.0-py3-none-any.whl (18 kB)
Using cached grpcio_health_checking-1.73.1-py3-none-any.whl (18 kB)
Using cached grpcio_health_checking-1.73.0-py3-none-any.whl (18 kB)
Using cached grpcio_health_checking-1.72.2-py3-none-any.whl (18 kB)
Using cached grpcio_health_checking-1.72.1-py3-none-any.whl (18 kB)
Using cached grpcio_health_checking-1.71.2-py3-none-any.whl (18 kB)
Using cached grpcio_health_checking-1.71.0-py3-none-any.whl (18 kB)
Using cached grpcio_health_checking-1.70.0-py3-none-any.whl (18 kB)
Using cached grpcio_health_checking-1.69.0-py3-none-any.whl (18 kB)
Using cached grpcio_health_checking-1.68.1-py3-none-any.whl (18 kB)
Using cached grpcio_health_checking-1.68.0-py3-none-any.whl (18 kB)
Using cached grpcio_health_checking-1.67.1-py3-none-any.whl (18 kB)
Using cached grpcio_health_checking-1.67.0-py3-none-any.whl (18 kB)
Using cached grpcio_health_checking-1.66.2-py3-none-any.whl (18 kB)
Using cached grpcio_health_checking-1.66.1-py3-none-any.whl (18 kB)
Using cached grpcio_health_checking-1.66.0-py3-none-any.whl (18 kB)
Using cached grpcio_health_checking-1.65.5-py3-none-any.whl (18 kB)
Using cached grpcio_health_checking-1.65.4-py3-none-any.whl (18 kB)
Using cached grpcio_health_checking-1.65.2-py3-none-any.whl (18 kB)
Using cached grpcio_health_checking-1.65.1-py3-none-any.whl (18 kB)
Using cached grpcio_health_checking-1.64.3-py3-none-any.whl (18 kB)
Using cached grpcio_health_checking-1.64.1-py3-none-any.whl (18 kB)
Using cached grpcio_health_checking-1.64.0-py3-none-any.whl (18 kB)
Using cached grpcio_health_checking-1.63.2-py3-none-any.whl (18 kB)
Using cached grpcio_health_checking-1.63.0-py3-none-any.whl (18 kB)
Using cached grpcio_health_checking-1.62.3-py3-none-any.whl (18 kB)
Collecting idna<4,>=2.5
Using cached idna-3.10-py3-none-any.whl (70 kB)
Collecting charset_normalizer<4,>=2
Using cached charset_normalizer-3.4.3-cp39-cp39-macosx_10_9_universal2.whl (207 kB)
Collecting certifi>=2017.4.17
Using cached certifi-2025.8.3-py3-none-any.whl (161 kB)
Collecting urllib3<3,>=1.21.1
Using cached urllib3-2.5.0-py3-none-any.whl (129 kB)
Collecting markdown-it-py>=2.2.0
Using cached markdown_it_py-3.0.0-py3-none-any.whl (87 kB)
Collecting pygments<3.0.0,>=2.13.0
Using cached pygments-2.19.2-py3-none-any.whl (1.2 MB)
Collecting mdurl~=0.1
Using cached mdurl-0.1.2-py3-none-any.whl (10.0 kB)
Collecting shellingham>=1.3.0
Using cached shellingham-1.5.4-py2.py3-none-any.whl (9.8 kB)
Installing collected packages: mdurl, typing-extensions, pygments, pycparser, markdown-it-py, urllib3, shellingham, rich, protobuf, idna, grpcio, click, charset-normalizer, cffi, certifi, typer, tomli-w, tomli, requests, pyyaml, pycryptodome, pathspec, numpy, iterators, grpcio-health-checking, cryptography, flwr
Successfully installed certifi-2025.8.3 cffi-2.0.0 charset-normalizer-3.4.3 click-8.1.8 cryptography-44.0.3 flwr-1.21.0 grpcio-1.75.0 grpcio-health-checking-1.62.3 idna-3.10 iterators-0.0.2 markdown-it-py-3.0.0 mdurl-0.1.2 numpy-2.0.2 pathspec-0.12.1 protobuf-4.25.8 pycparser-2.23 pycryptodome-3.23.0 pygments-2.19.2 pyyaml-6.0.2 requests-2.32.5 rich-13.9.4 shellingham-1.5.4 tomli-2.2.1 tomli-w-1.2.0 typer-0.12.5 typing-extensions-4.15.0 urllib3-2.5.0
WARNING: You are using pip version 21.2.4; however, version 25.2 is available.
You should consider upgrading via the '/Users/spartan/Desktop/Projects/FlowerHackthonDecentralizedProject/env/bin/python3 -m pip install --upgrade pip' command.
(env) spartan@MLK-SCS-C02GL3N6Q05N FlowerHackthonDecentralizedProject % flwr new

💬 Please provide the app name: FaceSpoofProof

💬 Please provide your Flower username: thilakshriyan

💬 Please select ML framework by typing in the number

[ 0] PyTorch
[ 1] PyTorch (Message API)
[ 2] TensorFlow
[ 3] sklearn
[ 4] HuggingFace
[ 5] JAX
[ 6] MLX
[ 7] NumPy
[ 8] FlowerTune
[ 9] Flower Baseline

: 2

🔨 Creating Flower App FaceSpoofProof...
🎊 Flower App creation successful.

To run your Flower App, first install its dependencies:

    cd facespoofproof && pip install -e .

then, run the app:

    flwr run .

💡 Check the README in your app directory to learn how to
customize it and how to run it using the Deployment Runtime.

(env) spartan@MLK-SCS-C02GL3N6Q05N FlowerHackthonDecentralizedProject % cd facespoofproof && pip install -e .
ERROR: File "setup.py" or "setup.cfg" not found. Directory cannot be installed in editable mode: /Users/spartan/Desktop/Projects/FlowerHackthonDecentralizedProject/facespoofproof
(A "pyproject.toml" file was found, but editable mode currently requires a setuptools-based build.)
WARNING: You are using pip version 21.2.4; however, version 25.2 is available.
You should consider upgrading via the '/Users/spartan/Desktop/Projects/FlowerHackthonDecentralizedProject/env/bin/python3 -m pip install --upgrade pip' command.