diff --git a/.github/workflows/build-for-pr.yml b/.github/workflows/build-for-pr.yml
index abdcd6ca61e..2d5796d3e42 100644
--- a/.github/workflows/build-for-pr.yml
+++ b/.github/workflows/build-for-pr.yml
@@ -139,7 +139,7 @@ jobs:
           retention-days: 10 ## No need to keep CI builds more than 10 days
 
   build-mac-for-pr:
-    runs-on: macos-12
+    runs-on: macos-15
     if: ${{ github.event.label.name == 'Build Apps for PR' }}
     steps:
       - name: ci/checkout-repo
@@ -158,6 +158,7 @@ jobs:
         run: |
           brew install yq
           jq '.mac.target=["zip"]' electron-builder.json | jq '.mac.gatekeeperAssess=false' > /tmp/electron-builder.json && cp /tmp/electron-builder.json .
+          sudo xcode-select -s /Applications/Xcode_16.1.app/Contents/Developer
           npm ci
       - name: ci/build
         env:
diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 8d27ac3b9ff..c898f6fbfdf 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -142,7 +142,7 @@ jobs:
           retention-days: 10 ## No need to keep CI builds more than 10 days
 
   build-mac-no-dmg:
-    runs-on: macos-12
+    runs-on: macos-15
     steps:
       - name: ci/checkout-repo
         uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
@@ -158,6 +158,7 @@ jobs:
         run: |
           brew install yq
           jq '.mac.target=["zip"]' electron-builder.json | jq '.mac.gatekeeperAssess=false' > /tmp/electron-builder.json && cp /tmp/electron-builder.json .
+          sudo xcode-select -s /Applications/Xcode_16.1.app/Contents/Developer
           npm ci
       - name: ci/test
         uses: ./.github/actions/test
diff --git a/.github/workflows/nightly-builds.yaml b/.github/workflows/nightly-builds.yaml
index 1b5010745d9..9d3d6ebb05f 100644
--- a/.github/workflows/nightly-builds.yaml
+++ b/.github/workflows/nightly-builds.yaml
@@ -49,7 +49,7 @@ jobs:
     strategy:
       matrix:
         runs-on:
-          - macos-13
+          - macos-15
           - ubuntu-22.04
           - windows-2022
     uses: ./.github/workflows/e2e-functional-template.yml
diff --git a/.github/workflows/nightly-main.yml b/.github/workflows/nightly-main.yml
index 41783c118b7..afa85fab9cb 100644
--- a/.github/workflows/nightly-main.yml
+++ b/.github/workflows/nightly-main.yml
@@ -106,7 +106,7 @@ jobs:
           retention-days: 5 ## No need to keep them since they are uploaded on S3
 
   mac-app-store-preflight:
-    runs-on: macos-12
+    runs-on: macos-15
     env:
       MAS_PROFILE: ${{ secrets.MM_DESKTOP_MAC_APP_STORE_MAS_PROFILE }}
       MACOS_API_KEY_ID: ${{ secrets.MM_DESKTOP_MAC_APP_STORE_MACOS_API_KEY_ID }}
@@ -129,6 +129,7 @@ jobs:
       - name: nightly/install-dependencies
         run: |
           brew install yq
+          sudo xcode-select -s /Applications/Xcode_16.1.app/Contents/Developer
           npm ci
       - name: nightly/copy-provisioning-profile
         run: echo $MAS_PROFILE | base64 -D > ./mas.provisionprofile
@@ -142,7 +143,7 @@ jobs:
         run: fastlane publish_test path:"$(find . -name \*.pkg -print -quit)"
 
   build-mac-installer:
-    runs-on: macos-12
+    runs-on: macos-15
     needs:
       - mac-app-store-preflight
     steps:
@@ -159,6 +160,7 @@ jobs:
       - name: nightly/install-dependencies
         run: |
           brew install yq rename
+          sudo xcode-select -s /Applications/Xcode_16.1.app/Contents/Developer
           npm ci
       - name: nightly/test
         uses: ./.github/actions/test
diff --git a/.github/workflows/nightly-rainforest.yml b/.github/workflows/nightly-rainforest.yml
index db7be574bc1..3c89a997767 100644
--- a/.github/workflows/nightly-rainforest.yml
+++ b/.github/workflows/nightly-rainforest.yml
@@ -73,7 +73,7 @@ jobs:
           retention-days: 5 ## No need to keep them since they are uploaded on S3
 
   build-mac-installer:
-    runs-on: macos-12
+    runs-on: macos-15
     steps:
       - name: nightly/checkout-repo
         uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
@@ -88,6 +88,7 @@ jobs:
       - name: nightly/install-dependencies
         run: |
           brew install yq rename
+          sudo xcode-select -s /Applications/Xcode_16.1.app/Contents/Developer
           npm ci
       - name: nightly/test
         uses: ./.github/actions/test
diff --git a/.github/workflows/release-mas.yaml b/.github/workflows/release-mas.yaml
index 71005d8dcd3..a5eb14f73d1 100644
--- a/.github/workflows/release-mas.yaml
+++ b/.github/workflows/release-mas.yaml
@@ -15,7 +15,7 @@ env:
 
 jobs:
   mac-app-store-preflight:
-    runs-on: macos-12
+    runs-on: macos-15
     env:
       MAS_PROFILE: ${{ secrets.MM_DESKTOP_MAC_APP_STORE_MAS_PROFILE }}
       MACOS_API_KEY_ID: ${{ secrets.MM_DESKTOP_MAC_APP_STORE_MACOS_API_KEY_ID }}
@@ -36,6 +36,7 @@ jobs:
       - name: release/install-dependencies
         run: |
           brew install yq
+          sudo xcode-select -s /Applications/Xcode_16.1.app/Contents/Developer
           npm ci
       - name: release/copy-provisioning-profile
         run: echo $MAS_PROFILE | base64 -D > ./mas.provisionprofile
diff --git a/.github/workflows/release.yaml b/.github/workflows/release.yaml
index fd7bc806b09..30b19b63278 100644
--- a/.github/workflows/release.yaml
+++ b/.github/workflows/release.yaml
@@ -119,7 +119,7 @@ jobs:
           retention-days: 14
 
   build-mac-installer:
-    runs-on: macos-12
+    runs-on: macos-15
     needs:
       - begin-notification
     steps:
@@ -136,6 +136,7 @@ jobs:
       - name: release/install-dependencies
         run: |
           brew install yq rename
+          sudo xcode-select -s /Applications/Xcode_16.1.app/Contents/Developer
           npm ci
       - name: release/test
         uses: ./.github/actions/test