diff --git a/.github/workflows/test_branches.yml b/.github/workflows/test_branches.yml
index 530ab9cc4e1..e5af7e5cbe5 100644
--- a/.github/workflows/test_branches.yml
+++ b/.github/workflows/test_branches.yml
@@ -119,7 +119,7 @@ jobs:
           mpi: 3
           TARGET: linux
           PYENV: conda
-          PACKAGES: openmpi mpi4py
+          PACKAGES: openmpi==*[build=h*] mpi4py
 
         - os: ubuntu-latest
           python: 3.12
@@ -831,12 +831,12 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, macos-13, windows-latest]
+        os: [ubuntu-latest, macos-latest, windows-latest]
 
         include:
         - os: ubuntu-latest
           TARGET: linux
-        - os: macos-13
+        - os: macos-latest
           TARGET: osx
         - os: windows-latest
           TARGET: win
diff --git a/.github/workflows/test_pr_and_main.yml b/.github/workflows/test_pr_and_main.yml
index 59924f6d0e1..62814d904fa 100644
--- a/.github/workflows/test_pr_and_main.yml
+++ b/.github/workflows/test_pr_and_main.yml
@@ -93,7 +93,8 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        python: [ '3.10', 3.11, 3.12, 3.13, 3.14 ]
+        # FIXME: pinning to 3.14.0 until 3.14.1 is removed from runner tool cache
+        python: [ '3.10', 3.11, 3.12, 3.13, 3.14.0 ]
         other: [""]
         category: [""]
 
@@ -128,7 +129,7 @@ jobs:
           mpi: 3
           TARGET: linux
           PYENV: conda
-          PACKAGES: openmpi mpi4py
+          PACKAGES: openmpi==*[build=h*] mpi4py
 
         - os: ubuntu-latest
           python: 3.12
@@ -884,12 +885,12 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, macos-13, windows-latest]
+        os: [ubuntu-latest, macos-latest, windows-latest]
 
         include:
         - os: ubuntu-latest
           TARGET: linux
-        - os: macos-13
+        - os: macos-latest
           TARGET: osx
         - os: windows-latest
           TARGET: win
diff --git a/README.md b/README.md
index 362fc88e142..409aa5bee06 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@
 [![Documentation Status](https://readthedocs.org/projects/pyomo/badge/?version=latest)](https://pyomo.readthedocs.org/en/latest/)
 [![Build services](https://github.com/Pyomo/jenkins-status/blob/main/pyomo_services.svg)](https://pyomo-jenkins.sandia.gov/)
 [![GitHub contributors](https://img.shields.io/github/contributors/pyomo/pyomo.svg)](https://github.com/pyomo/pyomo/graphs/contributors)
-[![Merged PRs](https://img.shields.io/github/issues-pr-closed-raw/pyomo/pyomo.svg?label=merged+PRs)](https://github.com/pyomo/pyomo/pulls?q=is:pr+is:merged)
+[![Merged PRs](https://img.shields.io/github/issues-pr-closed-raw/pyomo/pyomo.svg?label=merged+PRs&color=44cc11)](https://github.com/pyomo/pyomo/pulls?q=is:pr+is:merged)
 
 [![a COIN-OR project](https://www.coin-or.org/GitHub/coin-or-badge.png)](https://www.coin-or.org)
 
diff --git a/doc/OnlineDocs/explanation/analysis/iis.rst b/doc/OnlineDocs/explanation/analysis/iis.rst
index 773560c4e28..7c31f5ff087 100644
--- a/doc/OnlineDocs/explanation/analysis/iis.rst
+++ b/doc/OnlineDocs/explanation/analysis/iis.rst
@@ -37,7 +37,7 @@ as part of the watertap project (https://github.com/watertap-org/watertap)
 and is therefore governed by a license shown
 at the top of ``mis.py``.
 
-The algorithms come from John Chinneck's slides, see: https://www.sce.carleton.ca/faculty/chinneck/docs/CPAIOR07InfeasibilityTutorial.pdf
+The algorithms come from John Chinneck's slides, see: http://www.sce.carleton.ca/faculty/chinneck/docs/CPAIOR07InfeasibilityTutorial.pdf
 
 Solver
 ------
diff --git a/pyomo/contrib/iis/mis.py b/pyomo/contrib/iis/mis.py
index 12f3ec91ec1..c804e0c5ca6 100644
--- a/pyomo/contrib/iis/mis.py
+++ b/pyomo/contrib/iis/mis.py
@@ -31,7 +31,7 @@
 
 copied by DLW 18Feb2024 and edited
 
-See: https://www.sce.carleton.ca/faculty/chinneck/docs/CPAIOR07InfeasibilityTutorial.pdf
+See: http://www.sce.carleton.ca/faculty/chinneck/docs/CPAIOR07InfeasibilityTutorial.pdf
 """
 
 import logging