diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index e173f9a6..239f43bd 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -200,7 +200,8 @@ build-linux:
 build-macos:
   stage: build
   dependencies: []
-  tags: [macos:sonoma, specific:true] # Use AMI dd-sdk-cpp-sonoma, w/ Xcode 15.3.0, AppleClang 15
+  tags: [macos:tart]
+  image: "486234852809.dkr.ecr.us-east-1.amazonaws.com/ci/ci-platform-machine-images/tart-vm:dd-sdk-cpp-sonoma-latest"
   parallel:
     # Ensure that all targets build on macOS
     matrix:
@@ -229,8 +230,11 @@ build-macos:
 test-macos:
   stage: build
   dependencies: []
-  tags: [macos:sonoma, specific:true] # Use AMI dd-sdk-cpp-sonoma
+  tags: [macos:tart]
+  image: "486234852809.dkr.ecr.us-east-1.amazonaws.com/ci/ci-platform-machine-images/tart-vm:dd-sdk-cpp-sonoma-latest"
   script:
+    - export PYENV_ROOT="$HOME/.pyenv"
+    - export PATH="$PYENV_ROOT/shims:$PYENV_ROOT/bin:$PATH"
     - python -m venv .venv && .venv/bin/python -m pip install -e '.[integration-test]'
     - >
       cmake
@@ -321,7 +325,8 @@ package-linux:
 package-macos:
   stage: package
   dependencies: []
-  tags: [macos:sonoma, specific:true] # Use AMI dd-sdk-cpp-sonoma, w/ Xcode 15.3.0, AppleClang 15
+  tags: [macos:tart]
+  image: "486234852809.dkr.ecr.us-east-1.amazonaws.com/ci/ci-platform-machine-images/tart-vm:dd-sdk-cpp-sonoma-latest"
   parallel:
     matrix:
       # macos-{arch}-clang-libc++-shared-release
diff --git a/tests/impl/core/platform/system_info_test.cpp b/tests/impl/core/platform/system_info_test.cpp
index 74b41039..a7eb26c5 100644
--- a/tests/impl/core/platform/system_info_test.cpp
+++ b/tests/impl/core/platform/system_info_test.cpp
@@ -185,9 +185,10 @@ TEST_CASE("SystemInfo", "[unit][platform-system-info]") {
     // And the brand is "Apple"
     REQUIRE(device_info.brand == "Apple");
 
-    // And the model starts with "Mac" (if not empty)
+    // And the model starts with "VirtualMac" (if not empty); CI runs in
+    // Apple Virtualization VMs, which report hw.model as "VirtualMac<N>,<M>".
     if (!device_info.model.empty()) {
-      REQUIRE(device_info.model.find("Mac") == 0);
+      REQUIRE(device_info.model.find("VirtualMac") == 0);
     }
 
     // And the name is an alphabetical prefix of the model (if both are present)