I had the exact same error messages as the OP & still having troubles. Followed the steps above, which did seem to do some stuff, but now the launcher gives new errors (which I’ve seen on other posts, but I’ve been unable to get a workaround to work). I’m on an M1 2020 MBP w/ Sequoia 15.6:
Anki Launcher
Checking for updates…
Updating Anki…
warning: Failed to patch the install name of the dynamic library for /Users/xxxxx/Library/Application Support/AnkiProgramFiles/python/cpython-3.13.5-macos-aarch64-none/bin/python3.13. This may cause issues when building Python native extensions.
error: Querying Python at `/Users/xxxxx/Library/Application Support/AnkiProgramFiles/python/cpython-3.13.5-macos-aarch64-none/bin/python3.13` failed with exit status signal: 9 (SIGKILL)
Install failed: Failed to run (2): /Applications/Anki.app/Contents/MacOS/uv sync --upgrade --managed-python --no-config --python 3.13.5
Error: Failed to run (2): /Applications/Anki.app/Contents/MacOS/uv sync --upgrade --managed-python --no-config --python 3.13.5