Why the python interpreter's version is always 3.8 even MacOS version is packaged with the python 3.9.

[JeongJun-Lee]

I made a package for MacOS with python 3.9 interpreter but, I don't understand why the python interpreter's version is always 3.8 when the Mu's for the first time fresh start.

How can I overcome the limitation for 3.8 version only? Thank you.

mu.log

2025-04-10 00:03:50,492 - root:365(run) INFO: Process id: 80505
2025-04-10 00:03:50,522 - root:366(run) INFO: Platform: macOS-13.7.4-x86_64-i386-64bit
2025-04-10 00:03:50,523 - root:367(run) INFO: Python path: ['/Applications/Mu Editor.app/Contents/Resources/Python/lib/python39.zip', '/Applications/Mu Editor.app/Contents/Resources/Python/lib/python3.9', '/Applications/Mu Editor.app/Contents/Resources/Python/lib/python3.9/lib-dynload', '/Applications/Mu Editor.app/Contents/Resources/Python/lib/python3.9/site-packages']
2025-04-10 00:03:50,523 - root:368(run) INFO: Language code: ko_KR
2025-04-10 00:03:50,525 - mu.settings:220(load) WARNING: No settings file found at /Users/comseong/Library/Application Support/mu/settings.json; skipping
2025-04-10 00:03:50,962 - mu.virtual_environment:650(ensure_and_create) INFO: Added log handler.
2025-04-10 00:03:50,962 - mu.virtual_environment:661(ensure_and_create) DEBUG: Checking virtual environment; attempt #1.
2025-04-10 00:03:50,962 - mu.virtual_environment:870(create_venv) INFO: Creating virtualenv: /Users/comseong/Library/Application Support/mu/mu_venv-39-20250306-084801
2025-04-10 00:03:50,963 - mu.virtual_environment:871(create_venv) INFO: Virtualenv name: mu_venv-39-20250306-084801
2025-04-10 00:03:50,963 - mu.virtual_environment:494(run_subprocess) INFO: Running ('/Applications/Mu Editor.app/Contents/MacOS/../Resources/Python/bin/Mu Editor', '-I', '-m', 'virtualenv', '-p', '/Applications/Mu Editor.app/Contents/MacOS/../Resources/Python/bin/Mu Editor', '-q', '--symlinks', '/Users/comseong/Library/Application Support/mu/mu_venv-39-20250306-084801') with kwargs {'env': {'USER': 'comseong', 'COMMAND_MODE': 'unix2003', '__CFBundleIdentifier': 'com.github.mu-editor.mu', 'PATH': '/usr/bin:/bin:/usr/sbin:/sbin', 'LOGNAME': 'comseong', 'SSH_AUTH_SOCK': '/private/tmp/com.apple.launchd.EHofU9i0PJ/Listeners', 'HOME': '/Users/comseong', 'SHELL': '/bin/bash', 'TMPDIR': '/var/folders/9d/vq1v6bv94wb25wvhg34lr44h0000gp/T/', '__CF_USER_TEXT_ENCODING': '0x1F6:0x3:0x33', 'XPC_SERVICE_NAME': 'application.com.github.mu-editor.mu.278997533.278997540', 'XPC_FLAGS': '0x0', 'TCL_LIBRARY': '/Applications/Mu Editor.app/Contents/MacOS/../Resources/Python/lib/tcl8.6', 'LC_CTYPE': 'UTF-8', 'QT_API': 'pyqt5', 'QT_AUTO_SCREEN_SCALE_FACTOR': '1', 'QT_MAC_WANTS_LAYER': '1'}}
2025-04-10 00:03:54,714 - mu.virtual_environment:506(run_subprocess) DEBUG: Process returned 0; output: No output received.
2025-04-10 00:03:54,715 - mu.virtual_environment:890(create_venv) INFO: Created virtual environment using /Applications/Mu Editor.app/Contents/MacOS/../Resources/Python/bin/Mu Editor at /Users/comseong/Library/Application Support/mu/mu_venv-39-20250306-084801
2025-04-10 00:03:54,746 - mu.virtual_environment:967(install_baseline_packages) INFO: Installing baseline packages.
2025-04-10 00:03:54,762 - mu.virtual_environment:145(run_blocking) INFO: About to run blocking /Users/comseong/Library/Application Support/mu/mu_venv-39-20250306-084801/bin/pip with args ['--version', '--disable-pip-version-check'] and envvars {}
2025-04-10 00:03:56,193 - mu.virtual_environment:195(wait) DEBUG: Finished: True; exitStatus 0; exitCode 1
2025-04-10 00:03:56,194 - mu.virtual_environment:230(wait) ERROR: Traceback (most recent call last):
  File "/Users/comseong/Library/Application Support/mu/mu_venv-39-20250306-084801/bin/pip", line 7, in <module>
    from pip._internal.cli.main import main
ModuleNotFoundError: No module named 'pip'
2025-04-10 00:03:56,207 - mu.virtual_environment:708(ensure_and_create) ERROR: Process finished but with error code 1:
Traceback (most recent call last):
  File "/Users/comseong/Library/Application Support/mu/mu_venv-39-20250306-084801/bin/pip", line 7, in <module>
    from pip._internal.cli.main import main
ModuleNotFoundError: No module named 'pip'
2025-04-10 00:03:56,450 - mu.virtual_environment:605(quarantine_venv) INFO: Quarantined /Users/comseong/Library/Application Support/mu/mu_venv-39-20250306-084801 as /Users/comseong/Library/Application Support/mu/mu_venv-39-20250306-084801.FAILED
2025-04-10 00:03:56,463 - mu.virtual_environment:525(relocate) DEBUG: Relocating to /Users/comseong/Library/Application Support/mu/mu_venv-39-20250410-000356
2025-04-10 00:03:56,463 - mu.virtual_environment:541(relocate) DEBUG: Virtual environment set up mu_venv-39-20250410-000356 at /Users/comseong/Library/Application Support/mu/mu_venv-39-20250410-000356