diff --git a/.evergreen/buildvariants-and-tasks.in.yml b/.evergreen/buildvariants-and-tasks.in.yml
index e61fea350e3..881a8ec6d76 100644
--- a/.evergreen/buildvariants-and-tasks.in.yml
+++ b/.evergreen/buildvariants-and-tasks.in.yml
@@ -18,8 +18,10 @@ const UNIT_TESTS_BUILD_VARIANTS = [
   {
     name: 'unit-tests-macos',
     display_name: 'Unit Tests MacOS',
-    run_on: 'macos-14-arm64',
-    run_on_gui: 'macos-14-arm64-gui'
+    // We only have gui variants of the macos 15, so both unit tests will be
+    // running on it. We will not be running those on patches to save resources
+    run_on: 'macos-15-arm64-gui', 
+    patchable: false,
   }
 ];
 
@@ -89,15 +91,15 @@ const TEST_PACKAGED_APP_BUILD_VARIANTS = [
     depends_on: 'package-macos-x64'
   },
   {
-    name: 'test-packaged-app-macos-14-arm',
-    display_name: 'MacOS arm64 14',
-    run_on: 'macos-14-arm64-gui',
+    name: 'test-packaged-app-macos-15-arm',
+    display_name: 'MacOS arm64 15',
+    run_on: 'macos-15-arm64-gui',
     depends_on: 'package-macos-arm'
   },
   {
-    name: 'test-packaged-app-macos-14-x64',
-    display_name: 'MacOS x64 14',
-    run_on: 'macos-14-gui',
+    name: 'test-packaged-app-macos-15-x64',
+    display_name: 'MacOS x64 15',
+    run_on: 'macos-15-amd64-gui',
     patchable: false,
     depends_on: 'package-macos-x64'
   }
@@ -150,6 +152,7 @@ buildvariants:
 
     display_name: <%= buildVariant.display_name %>
     run_on: <%= buildVariant.run_on %>
+    patchable: <%= buildVariant.patchable ?? true %>
     tasks:
     - name: test
     - name: test-electron
diff --git a/.evergreen/buildvariants-and-tasks.yml b/.evergreen/buildvariants-and-tasks.yml
index 29222711d29..0c3a866a989 100644
--- a/.evergreen/buildvariants-and-tasks.yml
+++ b/.evergreen/buildvariants-and-tasks.yml
@@ -9,28 +9,31 @@ buildvariants:
   - name: unit-tests-ubuntu
     display_name: Unit Tests Ubuntu
     run_on: ubuntu2204-large
+    patchable: true
     tasks:
       - name: test
       - name: test-electron
   - name: unit-tests-windows
     display_name: Unit Tests Windows
     run_on: windows-vsCurrent-large
+    patchable: true
     tasks:
       - name: test
       - name: test-electron
   - name: unit-tests-rhel
     display_name: Unit Tests RHEL
     run_on: rhel93-large
+    patchable: true
     tasks:
       - name: test
       - name: test-electron
   - name: unit-tests-macos
     display_name: Unit Tests MacOS
-    run_on: macos-14-arm64
+    run_on: macos-15-arm64-gui
+    patchable: false
     tasks:
       - name: test
       - name: test-electron
-        run_on: macos-14-arm64-gui
   - name: package-ubuntu
     expansions:
       target_platform: ubuntu
@@ -212,9 +215,9 @@ buildvariants:
       - name: test-packaged-app-macos-11-1
       - name: test-packaged-app-macos-11-2
       - name: test-packaged-app-macos-11-3
-  - name: test-packaged-app-macos-14-arm
-    display_name: Test Packaged App MacOS arm64 14
-    run_on: macos-14-arm64-gui
+  - name: test-packaged-app-macos-15-arm
+    display_name: Test Packaged App MacOS arm64 15
+    run_on: macos-15-arm64-gui
     patchable: true
     depends_on:
       - name: package-compass
@@ -223,10 +226,10 @@ buildvariants:
       - name: test-packaged-app-1
       - name: test-packaged-app-2
       - name: test-packaged-app-3
-  - name: test-packaged-app-macos-14-x64
-    display_name: Test Packaged App MacOS x64 14
-    run_on: macos-14-gui
-    patchable: false
+  - name: test-packaged-app-macos-15-x64
+    display_name: Test Packaged App MacOS x64 15
+    run_on: macos-15-amd64-gui
+    patchable: true
     depends_on:
       - name: package-compass
         variant: package-macos-x64