diff --git a/scripts/build_runtime.py b/scripts/build_runtime.py
index 1afea6c..1fc9935 100644
--- a/scripts/build_runtime.py
+++ b/scripts/build_runtime.py
@@ -193,7 +193,8 @@ def build_wasm3(release):
     if platform.system() == "Windows":
         build_wasm3_lib_win(release)
     elif platform.system() == "Darwin":
-        raise "can't yet build wasm3 on Mac"
+        log_error("can't yet build wasm3 on Mac")
+        exit(1)
     else:
         log_error(f"can't build wasm3 for unknown platform '{platform.system()}'")
         exit(1)
@@ -330,9 +331,6 @@ def verify_angle():
             "milepost/lib/libGLESv2.dll.lib",
         ]
     elif platform.system() == "Darwin":
-        if platform.machine() == "arm64":
-            log_warning(f"automated ANGLE builds are not yet available for Apple silicon")
-            return False
         checkfiles = [
             "milepost/lib/libEGL.dylib",
             "milepost/lib/libGLESv2.dylib",
@@ -360,8 +358,7 @@ def download_angle():
         build = "windows-2019"
         extensions = ["dll", "lib"]
     elif platform.system() == "Darwin":
-        # TODO(ben): make universal dylibs
-        build = "macos-12"
+        build = "macos-jank"
         extensions = ["dylib"]
     else:
         log_error(f"could not automatically download ANGLE for unknown platform {platform.system()}")
diff --git a/scripts/checksums.json b/scripts/checksums.json
index 3b28389..f5ca541 100644
--- a/scripts/checksums.json
+++ b/scripts/checksums.json
@@ -1,10 +1,10 @@
 {
     "scripts/files/angle-windows-2019-2023-07-05.zip": "a333b5ccc8462151ee8df65c43cfacd70d9db2413f2e495da65670737b5b2d96",
-    "scripts/files/angle-macos-12-2023-07-05.zip": "a3422c456278ff037ef89a7808e0ba256d972d4832d5272fc3d4aa4f7912c1e0",
+    "scripts/files/angle-macos-jank-2023-07-05.zip": "c234b8db179a24757ab9f46610a032123718dd9bed967d2bf8e27d0d17eb0aff",
     "milepost/lib/libEGL.dll": "b7bf51f83e88129ddc20c0c2cb904ec04c89059a30a2cd29b9b1ea11c80388fb",
     "milepost/lib/libEGL.dll.lib": "4cec54c534136da413dea86bd271ccb9c5ae88e40aa91d1de7a01e701be8e1d7",
     "milepost/lib/libGLESv2.dll": "193b53b0a16b702eaa28a73e84527acf7aecfd665e3e3f54a8d9db9ae73111e1",
     "milepost/lib/libGLESv2.dll.lib": "ee87aac129efe8fe871825d181b85da1b1ea6626cb48be52c2e689f2804b953f",
-    "milepost/lib/libEGL.dylib": "227445d896047207d1dcef91a8182d886692bc470f402033a6f0831eacb82592",
-    "milepost/lib/libGLESv2.dylib": "c814948060494796cda4a3febd8652e1bbf0787a69c2f7e9afd41fc666dc91fe"
+    "milepost/lib/libEGL.dylib": "96baea4b1c8578d30738764784d07b509d1153df694c094faba2ee8ccbfde2a9",
+    "milepost/lib/libGLESv2.dylib": "98ce9f6248a6447ba9199e96b8f6d87df9548d43ce583a2615717aab168ecb71"
 }