Install miniconda on macos

Grrr

Author: guyer

.azure/templates/install.yml

@@ -10,6 +10,17 @@ parameters:
   default: scipy
 
 steps:
+  - bash: |
+      # laggards on Azure/GHA team dropped miniconda on macos images
+      # https://github.com/actions/runner-images/issues/9262
+      mkdir -p ~/miniconda3
+      curl https://repo.anaconda.com/miniconda/Miniconda3-latest-MacOSX-x86_64.sh -o ~/miniconda3/miniconda.sh
+      bash ~/miniconda3/miniconda.sh -b -u -p ~/miniconda3
+      rm ~/miniconda3/miniconda.sh
+      echo "##vso[task.setvariable variable=CONDA;]${HOME}/miniconda3"
+    displayName: Install miniconda
+    condition: startsWith(variables.image, 'macos')
+
   - bash: |
       echo "# # vso [task.prependpath]$CONDA/bin"
       echo "##vso[task.prependpath]$CONDA/bin"