No supported wheels found for macOS arm64 about multibuild HOT 1 OPEN

OK, the solution I have found for now is to skip tests for arm64, so in my azure template in the install wheel and test:

condition: ne(variables['PLAT'], 'arm64'

That produces wheels for macos 11 (As I set the MACOSX_DEPLOYMENT_TARGET to 11.0) which seem to work well.

It would be of course be better to have the tests in place. If I understand correctly, what is happening here is that in my job matrix I have MB_PYTHON_OS_VER set to 10.9, and probably that old python doesn't recognize the wheel for osx 11. I tried to set the MB_PYTHON_OS_VER to 11, but that fails because multibuild is naming the python package to be downloaded incorrectly:

Python download failed! Check python-3.8.10-macosx11.0.pkg exists on the server.

when the package is named python-3.8.10-macos11.0.pkg (not macosx, the x is not needed, see here, so it seems to me that multibuild needs adaptation at that point.

from multibuild.