diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 41714ae..51517d4 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -21,6 +21,7 @@ jobs:
           - os: macos-12
           - os: macos-13
           - os: macos-14
+          - os: macos-15
     runs-on: ${{ matrix.config.os }}
     steps:
     - uses: actions/checkout@v4
@@ -42,6 +43,7 @@ jobs:
           - os: macos-12
           - os: macos-13
           - os: macos-14
+          - os: macos-15
     runs-on: ${{ matrix.config.os }}
     steps:
     - uses: actions/checkout@v4
@@ -63,6 +65,7 @@ jobs:
           - os: macos-12
           - os: macos-13
           - os: macos-14
+          - os: macos-15
     runs-on: ${{ matrix.config.os }}
     steps:
     - uses: actions/checkout@v4
diff --git a/macports-ci b/macports-ci
index ae7bdc8..cfdb7a4 100755
--- a/macports-ci
+++ b/macports-ci
@@ -122,6 +122,9 @@ elif test "$(echo $OSX_VERSION | cut -c1-2)" == 13 ; then
 elif test "$(echo $OSX_VERSION | cut -c1-2)" == 14 ; then
   OSX_VERSION=14
   OSX_NAME=Sonoma
+elif test "$(echo $OSX_VERSION | cut -c1-2)" == 15 ; then
+  OSX_VERSION=15
+  OSX_NAME=Sequoia
 else
   echo "macports-ci: Unknown OSX version $OSX_VERSION"
   exit 1