Add support for MacOS to testing workflow

.github/workflows/core.yml

@@ -33,7 +33,7 @@ concurrency:
   # to avoid over-canceling runs from `main`
   # in which case we'd need to access the PR number from somewhere else rather than `github.ref_name`
   # to avoid under-canceling runs from PRs
-  group: ${{ github.workflow }}-${{ github.ref_name }}
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
   cancel-in-progress: true
 
 env:
@@ -53,7 +53,7 @@ jobs:
     # OS and/or Python version don't make a difference, so we choose ubuntu and 3.10 for performance
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - uses: actions/setup-python@v5
         with:
@@ -75,7 +75,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout source
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Run Spell Checker
         uses: crate-ci/typos@v1.24.5
@@ -94,11 +94,14 @@ jobs:
         os:
           - linux
           - win64
+          - macos
         include:
           - os: linux
             runner-image: ubuntu-24.04
           - os: win64
             runner-image: windows-2022
+          - os: macos
+            runner-image: macos-latest
           - python-version: "3.11"
             # only generate coverage report for a single python version in the matrix
             # to avoid overloading Codecov
@@ -141,10 +144,10 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        report-variant: ["linux", "win64"]
+        report-variant: ["linux", "win64", "macos"]
     steps:
       # the checkout step is needed to have access to codecov.yml
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - uses: actions/download-artifact@v4
         with:
@@ -168,7 +171,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: [code-formatting, spell-check]
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Set up Conda environment
         uses: conda-incubator/setup-miniconda@v3
@@ -203,7 +206,7 @@ jobs:
       pylint_output_path: pylint.json
       pylint_todo_sentinel: PYLINT-TODO
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       # NOTE: using Conda instead of actions/setup-python in this job is not strictly necessary
       # as it doesn't need to run on Windows or use the setup-idaes local action,
       # but we do it for consistency with the other jobs

.github/workflows/integration.yml

@@ -27,7 +27,7 @@ on:
 concurrency:
   # NOTE: the value of `group` should be chosen carefully,
   # otherwise we might end up over- or under-canceling workflow runs
-  group: ${{ github.workflow }}-${{ github.ref_name }}
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
   cancel-in-progress: true
 
 env:
@@ -85,15 +85,16 @@ jobs:
           _GITHUB_EVENT_ACTION: ${{ github.event.action }}
         shell: python {0}
         run: |
-          import json
+          import json, os
           from os import environ as env
           def _display_on_run_dashboard(msg):
               # workflow warnings are displayed on the workflow run dashboard,
               # so we use this as a way to display a short summary of why this workflow is being run
               # without having to dig in each job's log output
               print(f'::warning ::{msg}')
           def _set_output(name, val):
-              print(f'::set-output name={name}::{val}')
+              with open(env["GITHUB_OUTPUT"], "a") as f:
+                  f.write(f"{name}={val}\n")
           event_name = env["GITHUB_EVENT_NAME"]
           event_action = env["_GITHUB_EVENT_ACTION"]
           is_pr = 'pull_request' in event_name.lower()
@@ -130,11 +131,14 @@ jobs:
         os:
           - linux
           - win64
+          - macos
         include:
           - os: linux
             runner-image: ubuntu-24.04
           - os: win64
             runner-image: windows-2022
+          - os: macos
+            runner-image: macos-latest
     steps:
       - uses: actions/checkout@v4
       - uses: ./.github/actions/display-debug-info
@@ -197,7 +201,6 @@ jobs:
 
   pytest-site-packages:
     name: Run tests from site-packages (non-editable) installation (${{ matrix.install-mode }}/${{ matrix.os }})
-    # NOTE: using ubuntu-latest (20.04) instead of 18.04 results in failures in power_generation/carbon_capture/mea_solvent_system/unit_models/tests/test_column.py
     runs-on: ${{ matrix.runner-image }}
     needs: [precheck]
     if: >-