idf.py menuconfig fails on Apple silicon

[tcgerhard]

Checklist

• Checked the issue tracker for similar issues to ensure this is not a duplicate
• Read the documentation to confirm the issue is not addressed there and your configuration is set correctly
• Tested with the latest version to ensure the issue hasn't been fixed

How often does this bug occurs?

always

Expected behavior

Complete without a traceback

Actual behavior (suspected bug)

MacOs 26.3.1 (a)

Following Step 2. at https://openthread.io/guides/border-router/espressif-esp32#configure-the-thread-and-the-wi-fi-network

idf.py fails with /Users/tom/.espressif/python_env/idf5.1_py3.8_env/lib/python3.8/site-packages/pydantic_core/_pydantic_core.cpython-38-darwin.so' (mach-o file, but is an incompatible architecture (have 'arm64', need 'x86_64'))
idf.py without argument successfully display help messsage
idf.py clean runs successfully but does not help

Error logs or terminal output

ImportError:
  dlopen(/Users/tom/.espressif/python_env/idf5.1_py3.8_env/lib/python3.8/site-packages/pydantic_core/_pydantic_core.cpython-38-darwin.so,
  0x0002): tried:
  '/Users/tom/.espressif/python_env/idf5.1_py3.8_env/lib/python3.8/site-packages/pydantic_core/_pydantic_core.cpython-38-darwin.so'
  (mach-o file, but is an incompatible architecture (have 'arm64', need
  'x86_64')),
  '/System/Volumes/Preboot/Cryptexes/OS/Users/tom/.espressif/python_env/idf5.1_py3.8_env/lib/python3.8/site-packages/pydantic_core/_pydantic_core.cpython-38-darwin.so'
  (no such file),
  '/Users/tom/.espressif/python_env/idf5.1_py3.8_env/lib/python3.8/site-packages/pydantic_core/_pydantic_core.cpython-38-darwin.so'
  (mach-o file, but is an incompatible architecture (have 'arm64', need
  'x86_64'))

Steps to reproduce the behavior

From https://openthread.io/guides/border-router/espressif-esp32#configure-the-thread-and-the-wi-fi-network

git clone -b v5.1.2 --recursive https://github.com/espressif/esp-idf.git
cd esp-idf
./install.sh
. ./export.sh
cd ..
git clone -b v1.0 --recursive https://github.com/espressif/esp-thread-br.git

and

cd esp-thread-br/examples/basic_thread_border_router
idf.py menuconfig

Project release version

5.1.2

System architecture

ARM 64-bit (Apple M1/M2, Raspberry Pi 4/5)

Operating system

MacOS

Operating system version

26.3.1 (a)

Shell

Bash

Additional context

Started from a clean directory.

[chshu]

IDF v5.1.2 is quite old. Please follow the documentation below to install the latest recommended version:
https://docs.espressif.com/projects/esp-thread-br/en/latest/dev-guide/build_and_run.html#set-up-the-repositories

You can also refer to the following guide for more detailed ESP-IDF setup instructions:
https://docs.espressif.com/projects/esp-idf/en/v5.5.4/esp32/get-started/linux-macos-setup.html

If you still encounter issues during the IDF setup, please file an issue here:
https://github.com/espressif/esp-idf/issues