Problem with Python Modules on MacOS

Hi Everybody,
I have some problem with the installation of ALICE RUN3 Software on MacOS Catilina.
Following the tutorial to build ALICE Software with Alibuild, after launch

aliBuild init O2@dev --defaults o2
I obtain this aswer:

The following packages will be built by aliBuild because

usage of a system version of it is not allowed or supported, by policy:

- pythia

- DDS

- lhapdf

- vgm

- defaults-release

- googletest

- GEANT4_VMC

- generators

- ROOT

- O2

- simulation

- GEANT4

- FairRoot

- hijing

- HepMC

- pythia6

- Vc

- GEANT3

==> The following packages will be picked up from the system:

- GSL

- Python

- autotools

- ZeroMQ

- FreeType

- libpng

- CMake

If this is not you want, you have to uninstall / unload them.

==> The following packages will be built by aliBuild because they couldn’t be picked up from the system:

- boost

- nanomsg

- Python-modules

- yaml-cpp

- protobuf

even if I install Python-Modules in the exact way suggested in the tutorial.
I try to build ignoring the problem but it crashes.

Thank you in advance,
Cheers,
Michele

Hi Michele, Did you solve this issue? I am having similar issue. Even if I follow the instructions and install all prerequisites, I am having python and python-modules in the list of ‘packages that iwill be built by aliBuild because they couldn’t be picked up from the system’. I think that is causing the crash while building O2 on my macOS-Monterey. Thanks for any lead.

Hi Michele and Anjaly,

I have also run into a similar issue with AliPhysics on MacOS Monterey on the Apple M1 chip. I believe I have followed the instructions and installed all the prerequisites properly, but after initializing AliPhysics, Python-modules is included in the list of “packages will be built by AliBuild because usage of a system version of it is not allowed or supported, by policy”. Please let me know if you find a solution for this issue.