diff --git a/.github/workflows/build-ss3.yml b/.github/workflows/build-ss3.yml
index 2e3b30a..7261306 100644
--- a/.github/workflows/build-ss3.yml
+++ b/.github/workflows/build-ss3.yml
@@ -22,6 +22,7 @@ jobs:
           - {os: windows-latest}
           - {os: macos-13}
           - {os: macos-latest}
+          - {os: macos-15}
           - {os: ubuntu-latest}
     # Limit run time to 90 min to avoid wasting action minutes.
     # was set to 15 and then 30 minutes previously, but compiling admb
@@ -97,7 +98,7 @@ jobs:
 
       - name: Get the last tag on unix (macOS and linux)
         id: get-latest-tag-unix
-        if: matrix.config.os == 'macos-13' || matrix.config.os == 'macos-latest' || matrix.config.os == 'ubuntu-latest'
+        if: matrix.config.os == 'macos-13' || matrix.config.os == 'macos-latest' || matrix.config.os == 'macos-15' || matrix.config.os == 'ubuntu-latest'
         run: |
           git tag
           latest_tag=$(git describe --abbrev=0 --tags)
@@ -109,7 +110,7 @@ jobs:
 
       - name: Pull the last tag value to use in the Rscript on unix (macOS and linux)
         id: get-version-unix
-        if: matrix.config.os == 'macos-13' || matrix.config.os == 'macos-latest' || matrix.config.os == 'ubuntu-latest'
+        if: matrix.config.os == 'macos-13' || matrix.config.os == 'macos-latest' || matrix.config.os == 'macos-15' || matrix.config.os == 'ubuntu-latest'
         run: |
           echo "${{ steps.get-latest-tag-unix.outputs.tag }}" > .github/last_tag.txt
           echo "${{ steps.get-latest-tag-unix.outputs.tag_commit }}" > .github/last_tag_commit.txt
@@ -210,7 +211,7 @@ jobs:
 
 
       - name: Build stock synthesis for mac m2 with admb docker image
-        if: matrix.config.os == 'macos-latest'
+        if: matrix.config.os == 'macos-latest' || matrix.config.os == 'macos-15'
         run: |
           brew update
           brew install docker
@@ -226,13 +227,13 @@ jobs:
           /bin/bash ./Make_SS_330_new.sh --admb docker -b SS330 -o
 
       - name: Verify binary on mac
-        if: matrix.config.os == 'macos-13' || matrix.config.os == 'macos-latest'
+        if: matrix.config.os == 'macos-13' || matrix.config.os == 'macos-latest' || matrix.config.os == 'macos-15'
         run: |
           shasum -a 256 SS330/ss3
           shasum -a 256 SS330/ss3_opt
           
       - name: Delete unneeded files and change exe names on mac
-        if: matrix.config.os == 'macos-13' || matrix.config.os == 'macos-latest'
+        if: matrix.config.os == 'macos-13' || matrix.config.os == 'macos-latest' || matrix.config.os == 'macos-15'
         run: |
           cd SS330
           rm *.obj *.htp *.cpp ss3_opt.tpl