diff --git a/.github/workflows/release-assets.yml b/.github/workflows/release-assets.yml
index 2314ecc..1304dd2 100644
--- a/.github/workflows/release-assets.yml
+++ b/.github/workflows/release-assets.yml
@@ -36,8 +36,8 @@ concurrency:
 
 jobs:
   # Build native binaries for the released commit. Runner arch is load-bearing:
-  # macos-13 is the last Intel image, macos-latest is Apple Silicon. Do not
-  # "modernize" macos-13 to macos-latest.
+  # macos-latest is Apple Silicon (aarch64). Intel macOS (x86_64-apple-darwin) is
+  # not shipped — keep it out of the installer and `pds upgrade` too.
   build:
     name: Build ${{ matrix.target }}
     runs-on: ${{ matrix.runner }}
@@ -48,9 +48,6 @@ jobs:
           - target: x86_64-unknown-linux-gnu
             runner: ubuntu-latest
             archive: tar.gz
-          - target: x86_64-apple-darwin
-            runner: macos-13       # Intel
-            archive: tar.gz
           - target: aarch64-apple-darwin
             runner: macos-latest   # Apple Silicon
             archive: tar.gz
diff --git a/crates/pseudoscript/src/upgrade.rs b/crates/pseudoscript/src/upgrade.rs
index a13b16c..b722d5d 100644
--- a/crates/pseudoscript/src/upgrade.rs
+++ b/crates/pseudoscript/src/upgrade.rs
@@ -71,7 +71,6 @@ fn install(tag: &str, target: &str, tmp: &Path) -> Result<()> {
 fn current_target() -> Result<&'static str> {
     let target = match (std::env::consts::OS, std::env::consts::ARCH) {
         ("linux", "x86_64") => "x86_64-unknown-linux-gnu",
-        ("macos", "x86_64") => "x86_64-apple-darwin",
         ("macos", "aarch64") => "aarch64-apple-darwin",
         ("windows", "x86_64") => "x86_64-pc-windows-msvc",
         (os, arch) => bail!(
diff --git a/scripts/install.sh b/scripts/install.sh
index 7f5d095..ad6e21c 100755
--- a/scripts/install.sh
+++ b/scripts/install.sh
@@ -42,7 +42,12 @@ detect_platform() {
 
     # Only targets with a prebuilt release asset are supported.
     case "$target" in
-        x86_64-unknown-linux-gnu|x86_64-apple-darwin|aarch64-apple-darwin) ;;
+        x86_64-unknown-linux-gnu|aarch64-apple-darwin) ;;
+        x86_64-apple-darwin)
+            echo "error: no prebuilt binary for Intel macOS" >&2
+            echo "       build from source: cargo install --git https://github.com/$REPO" >&2
+            exit 1
+            ;;
         aarch64-unknown-linux-gnu)
             echo "error: no prebuilt binary for aarch64 Linux" >&2
             echo "       build from source: cargo install --git https://github.com/$REPO" >&2