I was wondering if anyone's looked into running the stuart tools on macOS?
I have an Intel Mac Pro, but from what I can see it's not possible to register a non-native executable handler like you can on Linux - so directly running Mono .exe files isn't supported.
When I run "stuart_update -c .pytool/CISettings.py TOOL_CHAIN_TAG=XCODE5 -v" I get 'Permission denied' errors despite having mono installed (via brew):

INFO - Cmd to run is: /Users/bcran/src/uefi/edk2/.venv/lib/python3.9/site-packages/edk2toolext/bin/NuGet.exe locals global-packages -list
INFO - Cmd to run is: /Users/bcran/src/uefi/edk2/.venv/lib/python3.9/site-packages/edk2toolext/bin/NuGet.exe locals global-packages -list
INFO - ------------------------------------------------
INFO - Cmd to run is: /Users/bcran/src/uefi/edk2/.venv/lib/python3.9/site-packages/edk2toolext/bin/NuGet.exe locals global-packages -list		
INFO - ------------------------------------------------
INFO - --------------Cmd Output Starting---------------
INFO - ------------------------------------------------
INFO - --------------Cmd Output Starting---------------
INFO - ------------------------------------------------
INFO - --------------Cmd Output Starting---------------
INFO - ------------------------------------------------
INFO - ------------------------------------------------
INFO - /bin/sh: /Users/bcran/src/uefi/edk2/.venv/lib/python3.9/site-packages/edk2toolext/bin/NuGet.exe: Permission denied
INFO - /bin/sh: /Users/bcran/src/uefi/edk2/.venv/lib/python3.9/site-packages/edk2toolext/bin/NuGet.exe: Permission denied
INFO - ------------------------------------------------
INFO - ------------------------------------------------
INFO - --------------Cmd Output Finished---------------
INFO - --------------Cmd Output Finished---------------
INFO - --------- Running Time (mm:ss): 00:00 ----------
INFO - --------- Running Time (mm:ss): 00:00 ----------
INFO - ----------- Return Code: 0x0000007e ------------
INFO - ----------- Return Code: 0x0000007e ------------
INFO - ------------------------------------------------
INFO - ------------------------------------------------
INFO - /bin/sh: /Users/bcran/src/uefi/edk2/.venv/lib/python3.9/site-packages/edk2toolext/bin/NuGet.exe: Permission denied
INFO - Nuget was unable to provide global packages cache location.
INFO - Nuget was unable to provide global packages cache location.

It seems we'd need to instead run it as "mono /Users/bcran/src/uefi/edk2/.venv/lib/python3.9/site-packages/edk2toolext/bin/NuGet.exe".

-- 
Rebecca Cran