diff --git a/.github/workflows/conda-pack-build.yml b/.github/workflows/conda-pack-build.yml
index 7e278a9..3a379fa 100644
--- a/.github/workflows/conda-pack-build.yml
+++ b/.github/workflows/conda-pack-build.yml
@@ -24,7 +24,7 @@ jobs:
             platform: linux-64
             env_file: unilabos-linux-64.yaml
             script_ext: sh
-          - os: macos-13 # Intel
+          - os: macos-15 # Intel (via Rosetta)
             platform: osx-64
             env_file: unilabos-osx-64.yaml
             script_ext: sh
diff --git a/.github/workflows/multi-platform-build.yml b/.github/workflows/multi-platform-build.yml
index a8785da..bcba6db 100644
--- a/.github/workflows/multi-platform-build.yml
+++ b/.github/workflows/multi-platform-build.yml
@@ -27,7 +27,7 @@ jobs:
           - os: ubuntu-latest
             platform: linux-64
             env_file: unilabos-linux-64.yaml
-          - os: macos-13 # Intel
+          - os: macos-15 # Intel (via Rosetta)
             platform: osx-64
             env_file: unilabos-osx-64.yaml
           - os: macos-latest # ARM64
diff --git a/.github/workflows/unilabos-conda-build.yml b/.github/workflows/unilabos-conda-build.yml
index 65f6fba..214f9bf 100644
--- a/.github/workflows/unilabos-conda-build.yml
+++ b/.github/workflows/unilabos-conda-build.yml
@@ -26,7 +26,7 @@ jobs:
         include:
           - os: ubuntu-latest
             platform: linux-64
-          - os: macos-13 # Intel
+          - os: macos-15 # Intel (via Rosetta)
             platform: osx-64
           - os: macos-latest # ARM64
             platform: osx-arm64