From ccbb01a50d18b1c78e83d0d65e28435d8173c19c Mon Sep 17 00:00:00 2001
From: Dan Bonachea <dobonachea@lbl.gov>
Date: Fri, 11 Sep 2026 21:10:50 -0700
Subject: [PATCH 1/2] CI: Retire macos-14 + flang testing

Homebrew has removed the macos-14 llvm bottle
---
 .github/workflows/build.yml | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index a6193671c..3cc303fad 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -73,9 +73,6 @@ jobs:
 
           # --- LLVM clang coverage ---
 
-          - os: macos-14
-            compiler: clang
-            version: 23
           - os: macos-15
             compiler: clang
             version: 23

From fef623e6328c2f24e406051ce4828a9879203721 Mon Sep 17 00:00:00 2001
From: Dan Bonachea <dobonachea@lbl.gov>
Date: Fri, 11 Sep 2026 22:04:55 -0700
Subject: [PATCH 2/2] CI: Disable gcc@16 and flang-23 on macOS+Intel

Homebrew ceased support for macintel in 2026-09
---
 .github/workflows/build.yml | 30 ++++++++++++++++++++++--------
 1 file changed, 22 insertions(+), 8 deletions(-)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 3cc303fad..27c7f792f 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -62,6 +62,14 @@ jobs:
         compiler: [ gcc ]
         version: [ 12, 13, 14, 15, 16 ]
 
+        exclude:
+
+          # Homebrew removed Intel bottles for gcc@16
+          - os: macos-15-intel
+            version: 16
+          - os: macos-26-intel
+            version: 16
+
         include:
           - os: ubuntu-24.04
             conduits: &ubuntu_conduits [ mpi, ibv, ofi, ucx ]
@@ -79,12 +87,12 @@ jobs:
           - os: macos-26
             compiler: clang
             version: 23
-          - os: macos-15-intel
-            compiler: clang
-            version: 23
-          - os: macos-26-intel
-            compiler: clang
-            version: 23
+          #- os: macos-15-intel
+          #  compiler: clang
+          #  version: 23
+          #- os: macos-26-intel
+          #  compiler: clang
+          #  version: 23
 
           # https://hub.docker.com/r/phhargrove/llvm-flang/tags
           - os: ubuntu-24.04
@@ -268,8 +276,14 @@ jobs:
         if [[ ${{ matrix.compiler }} == 'gcc' && ${COMPILER_VERSION} -gt 15 ]] ; then
           brew install gcc@${COMPILER_VERSION}
         fi
-        brew install libfabric openmpi
-        echo "CONFIGURE_ARGS=$CONFIGURE_ARGS --enable-ofi --enable-mpi" >> "$GITHUB_ENV"
+        if [[ ${{ runner.arch }} == "ARM64" ]]  ; then
+          # openmpi depends on gcc@latest which only has ARM64 bottles on macOS
+          brew install libfabric openmpi
+          echo "CONFIGURE_ARGS=$CONFIGURE_ARGS --enable-ofi --enable-mpi" >> "$GITHUB_ENV"
+        else
+          brew install libfabric
+          echo "CONFIGURE_ARGS=$CONFIGURE_ARGS --enable-ofi" >> "$GITHUB_ENV"
+        fi
 
 
     - name: Install LLVM on macOS