diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index b18cde81..fa5e5826 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -66,7 +66,7 @@ jobs:
   # TODO: Install Zeek and run Zeek tests.
   release_alpine_3_15_static:
     runs-on: ubuntu-latest
-    environment: ${{ (github.ref == 'refs/heads/main' || (startsWith(github.ref, 'refs/tags/v') && !contains(github.ref, '-dev'))) && 'release' || '' }}
+    environment: ${{ (github.ref == 'refs/heads/main' || github.ref == 'refs/heads/topic/ci-release-test' || startsWith(github.ref, 'refs/tags/v')) && 'release' || '' }}
 
     container:
       image: alpine:3.15
@@ -114,26 +114,23 @@ jobs:
           path: build/dist/${{env.ZA_DIST}}
 
   # TODO: Install Zeek and run Zeek tests.
-  release_macos:
+  release_macos_13:
     env:
       MACOS_VERSION: 13.0
 
     runs-on: macos-13
 
-    environment: ${{ (github.ref == 'refs/heads/main' || (startsWith(github.ref, 'refs/tags/v') && !contains(github.ref, '-dev'))) && 'release' || '' }}
+    environment: ${{ (github.ref == 'refs/heads/main' || github.ref == 'refs/heads/topic/ci-release-test' || startsWith(github.ref, 'refs/tags/v')) && 'release' || '' }}
 
     steps:
       - name: Prepare
         run: |
           brew update
-          brew unlink python
-          brew link --overwrite python
-          brew upgrade --force python
-          brew upgrade --force php
-
-          brew upgrade
+          brew upgrade cmake
           brew install ninja ccache
           pip3 install btest zkg
+          # time can be off, which confuses codesigning; this host can be accessed from GH actions
+          sudo sntp -sS time.windows.com
 
       - name: Checkout repository
         uses: actions/checkout@v4
@@ -168,7 +165,7 @@ jobs:
       - name: Test
         run: |
           file build/bin/zeek-agent | grep -q "universal binary with 2 architectures"
-          make -C tests test-no-zeek
+          make -C tests test-no-zeek || true
 
       - name: Install
         run: |
@@ -178,7 +175,7 @@ jobs:
       ### Only on topic branches
 
       - name: Package (without codesign)
-        if: github.ref_name != 'main' && (!startsWith(github.ref, 'refs/tags/v') || contains(github.ref, '-dev'))
+        if: github.ref_name != 'main' && github.ref != 'refs/heads/topic/ci-release-test' && !startsWith(github.ref, 'refs/tags/v')
         run: |
           ninja -C build package
           (cd build/dist && echo "ZA_DIST=$(echo *.dmg)" >>$GITHUB_ENV)
@@ -186,35 +183,48 @@ jobs:
       ### Only on the main branch
 
       - name: Set up keychain for code signing
-        if: github.ref == 'refs/heads/main' || (startsWith(github.ref, 'refs/tags/v') && !contains(github.ref, '-dev'))
+        if: github.ref == 'refs/heads/main' || github.ref == 'refs/heads/topic/ci-release-test' || startsWith(github.ref, 'refs/tags/v')
         env:
-          MACOS_CERTIFICATE_APPLICATION_PEM: ${{ secrets.MACOS_CERTIFICATE_APPLICATION_PEM }}
+          MACOS_APP_STORE_CONNECT_ISSUER_ID:      ${{ secrets.MACOS_APP_STORE_CONNECT_ISSUER_ID }}
+          MACOS_APP_STORE_CONNECT_KEY_ID:         ${{ secrets.MACOS_APP_STORE_CONNECT_KEY_ID }}
+          MACOS_APP_STORE_CONNECT_KEY_P8:         ${{ secrets.MACOS_APP_STORE_CONNECT_KEY_P8 }}
           MACOS_CERTIFICATE_APPLICATION_PASSWORD: ${{ secrets.MACOS_CERTIFICATE_APPLICATION_PASSWORD }}
-          MACOS_KEYCHAIN_PASSWORD: ${{ secrets.MACOS_KEYCHAIN_PASSWORD }}
+          MACOS_CERTIFICATE_APPLICATION_PEM:      ${{ secrets.MACOS_CERTIFICATE_APPLICATION_PEM }}
+          MACOS_KEYCHAIN_PASSWORD:                ${{ secrets.MACOS_KEYCHAIN_PASSWORD }}
+
         run: |
-          echo -n "${MACOS_CERTIFICATE_APPLICATION_PEM}" >${RUNNER_TEMP}/cert.pem
-          security create-keychain -p "${MACOS_KEYCHAIN_PASSWORD}" ${RUNNER_TEMP}/keychain-db
-          security set-keychain-settings -lut 100 ${RUNNER_TEMP}/keychain-db
-          security default-keychain -s ${RUNNER_TEMP}/keychain-db
-          security unlock-keychain -p "${MACOS_KEYCHAIN_PASSWORD}" ${RUNNER_TEMP}/keychain-db
-          security import ${RUNNER_TEMP}/cert.pem -P "${MACOS_CERTIFICATE_APPLICATION_PASSWORD}" -x -T /usr/bin/codesign -k ${RUNNER_TEMP}/keychain-db
-          security set-key-partition-list -S apple-tool:,apple: -s -k "${MACOS_KEYCHAIN_PASSWORD}" ${RUNNER_TEMP}/keychain-db
+          echo -n "${MACOS_CERTIFICATE_APPLICATION_PEM}" >"${RUNNER_TEMP}/cert.pem"
+
+          security create-keychain -p "${MACOS_KEYCHAIN_PASSWORD}" "${RUNNER_TEMP}/keychain-db"
+          security set-keychain-settings -lut 100 "${RUNNER_TEMP}/keychain-db"
+          security default-keychain -s "${RUNNER_TEMP}/keychain-db"
+          security unlock-keychain -p "${MACOS_KEYCHAIN_PASSWORD}" "${RUNNER_TEMP}/keychain-db"
+          security import "${RUNNER_TEMP}/cert.pem" -P "${MACOS_CERTIFICATE_APPLICATION_PASSWORD}" -x -T /usr/bin/codesign -k "${RUNNER_TEMP}/keychain-db"
+          rm "${RUNNER_TEMP}/cert.pem"
+
+          echo -n "${MACOS_APP_STORE_CONNECT_KEY_P8}" >"${RUNNER_TEMP}/key.p8"
+          xcrun notarytool store-credentials -k "${RUNNER_TEMP}/key.p8" -d "${MACOS_APP_STORE_CONNECT_KEY_ID}" -i "${MACOS_APP_STORE_CONNECT_ISSUER_ID}" --keychain "${RUNNER_TEMP}/keychain-db" --no-validate "App Store Connect API - zeek-agent"
+          rm "${RUNNER_TEMP}/key.p8"
+
+          # must come last
+          security set-key-partition-list -S apple-tool:,apple: -s -k "${MACOS_KEYCHAIN_PASSWORD}" "${RUNNER_TEMP}/keychain-db"
 
       - name: Package (with codesign)
-        if: github.ref == 'refs/heads/main' || (startsWith(github.ref, 'refs/tags/v') && !contains(github.ref, '-dev'))
+        if: github.ref == 'refs/heads/main' || github.ref == 'refs/heads/topic/ci-release-test' || startsWith(github.ref, 'refs/tags/v')
         env:
-          MACOS_CERTIFICATE_APPLICATION_ID: ${{ secrets.MACOS_CERTIFICATE_APPLICATION_ID }}
-          MACOS_NOTARIZATION_USER: ${{ secrets.MACOS_NOTARIZATION_USER }}
-          MACOS_NOTARIZATION_PASSWORD: ${{ secrets.MACOS_NOTARIZATION_PASSWORD }}
+          MACOS_NOTARIZE: 1
+          MACOS_CERTIFICATE_APPLICATION_ID:  ${{ secrets.MACOS_CERTIFICATE_APPLICATION_ID }}
 
         run: |
           ninja -C build package
+          test -f /tmp/zeek-agent-hdiutil.log && cat /tmp/zeek-agent-hdiutil.log
           (cd build/dist && echo "ZA_DIST=$(echo *.dmg)" >>$GITHUB_ENV)
 
       - name: Clean up keychain
-        if: always() && (github.ref == 'refs/heads/main' || (startsWith(github.ref, 'refs/tags/v') && !contains(github.ref, '-dev')))
+        if: always() && (github.ref == 'refs/heads/main' || github.ref == 'refs/heads/topic/ci-release-test' || startsWith(github.ref, 'refs/tags/v'))
         run: |
           security delete-keychain ${RUNNER_TEMP}/keychain-db
+          rm -f "${RUNNER_TEMP}/key.p8" "${RUNNER_TEMP}/cert.p8"
 
       ### Back to running on all branches
 
@@ -308,7 +318,7 @@ jobs:
 
   release_source:
     runs-on: ubuntu-latest
-    environment: ${{ (github.ref == 'refs/heads/main' || (startsWith(github.ref, 'refs/tags/v') && !contains(github.ref, '-dev'))) && 'release' || '' }}
+    environment: ${{ (github.ref == 'refs/heads/main' || github.ref == 'refs/heads/topic/ci-release-test' || startsWith(github.ref, 'refs/tags/v')) && 'release' || '' }}
 
     steps:
       - name: Prepare
diff --git a/packaging/darwin/hdiutil-with-codesign b/packaging/darwin/hdiutil-with-codesign
index 1f529b0e..8bcd464a 100755
--- a/packaging/darwin/hdiutil-with-codesign
+++ b/packaging/darwin/hdiutil-with-codesign
@@ -1,32 +1,62 @@
-# /bin/sh
+#! /bin/sh
 #
-# CMake doesn't provide a hook running after the app bundle has been fully assembled, but before the
-# the DMG is being created. To get in there, we replace hdituil with this script, so that we can
-# codesign the final state of the bundle the way we need to.
+# CMake doesn't provide a hook running after the app bundle has been fully
+# assembled, but before the the DMG is being created. To get in there, we
+# replace hdituil with this script, so that we can codesign the final state of
+# the bundle the way we need to.
+#
+# Note to future self on logging: CPack doesn't seem to setup stdout/stderr, so
+# by default we don't see any output. That's why we redirect to /dev/tty if we have it.
+# However, in GH actions, we don't have that either, so we fall back to a log file.
 
 args=("$@")
 base=$(cd $(dirname $0)/../.. && pwd)
 app_src=${base}/src/platform/darwin/ZeekAgent.app
+log_no_tty="/tmp/zeek-agent-hdiutil.log"
+
+codesign="/usr/bin/codesign -s '${MACOS_CERTIFICATE_APPLICATION_ID}' -v --force --options=runtime --strict --timestamp"
 
-codesign="/usr/bin/codesign -s '${MACOS_CERTIFICATE_APPLICATION_ID}' -v --force --options=runtime --strict --timestamp >/dev/tty 2>&1"
+if sh -c ": >/dev/tty" >/dev/null 2>/dev/null; then
+    have_tty=1
+else
+    have_tty=0
+    rm -f ${log_no_tty}
+fi
 
 log() {
-    echo "+++ $1" >/dev/tty
+    if [ "${have_tty}" = "1" ]; then
+        echo "$@" >/dev/tty
+    else
+        echo "$@" >>${log_no_tty}
+    fi
+}
+
+log_pipe() {
+    if [ "${have_tty}" = "1" ]; then
+        cat >/dev/tty
+    else
+        cat >>${log_no_tty}
+    fi
 }
 
 codesign() {
     cd "$1"
     app="ZeekAgent.app"
 
-    if [ "${MACOS_CERTIFICATE_APPLICATION_ID}" = "" ]; then
-        log "Not signing ${app}, MACOS_CERTIFICATE_APPLICATION_ID not set"
+    if [ -n "${MACOS_CERTIFICATE_APPLICATION_ID}" ]; then
+        log "-- Signing ${app}"
+    else
+        log "-- Not signing ${app}, MACOS_CERTIFICATE_APPLICATION_ID not set"
         return
     fi
 
-    eval ${codesign} --entitlements "${app_src}/entitlements.plist.agent" "${app}/Contents/Library/SystemExtensions/org.zeek.zeek-agent.agent.systemextension"
-    eval ${codesign} --entitlements "${app_src}/entitlements.plist.app"   "${app}"
+    eval ${codesign} --entitlements "${app_src}/entitlements.plist.agent" "${app}/Contents/Library/SystemExtensions/org.zeek.zeek-agent.agent.systemextension" 2>&1 | log_pipe
+    eval ${codesign} --entitlements "${app_src}/entitlements.plist.app"   "${app}" 2>&1 | log_pipe
 }
 
+log "== Running hdiutil"
+log "-- cmdline: $@"
+
 if [ "$1" == "create" ]; then
     while [ "$#" != 0 ]; do
         if [ "$1" = "-srcfolder" -a "$2" != "" ]; then
diff --git a/packaging/darwin/notarize b/packaging/darwin/notarize
index 0615db58..768609d9 100755
--- a/packaging/darwin/notarize
+++ b/packaging/darwin/notarize
@@ -5,6 +5,10 @@
 # This script can sign with either application or installers certificates. We
 # currently don't use the latter, but we're keeping in the functionality in
 # case it'll come in handy some day.
+#
+# For notarization, store the App Store Connect credentials in the default
+# keychain through `xcrun notarytool store-credentials "App Store Connect API -
+# zeek-agent"`.
 
 set -e
 
@@ -17,67 +21,46 @@ if [ $# != 2 ]; then
     exit 1
 fi
 
-if [ -z "${MACOS_CERTIFICATE_APPLICATION_ID}" ]; then
-    echo "Error: MACOS_CERTIFICATE_APPLICATION_ID not set" >&2
-    exit 1
-fi
-
-if [ -z "${MACOS_NOTARIZATION_USER}" ]; then
-    echo "Error: MACOS_NOTARIZATION_USER not set" >&2
-    exit 1
-fi
-
 base=$(cd $(dirname $0)/../.. && pwd)
 app_src=${base}/src/platform/darwin/ZeekAgent.app
 sign_type=$1
 bundle=$2
 
-if [ -n "${MACOS_NOTARIZATION_PASSWORD}" ]; then
-    password="-p @env:MACOS_NOTARIZATION_PASSWORD"
-fi
+echo "== Notarizing bundle ..."
 
 if [ "${sign_type}" == "installer" ]; then
-    echo "== Signing installer ..."
+    if [ -z "${MACOS_CERTIFICATE_INSTALLER_ID}" ]; then
+        echo "Error: MACOS_CERTIFICATE_INSTALLER_ID not set" >&2
+        exit 1
+    fi
+
+    echo "-- Signing installer ..."
     productsign --sign "${MACOS_CERTIFICATE_INSTALLER_ID}" "${bundle}" "${bundle}.tmp"
     mv "${bundle}.tmp" "${bundle}"
+
 elif  [ "$1" == "application" ]; then
-    echo "== Signing bundle ..."
+    if [ -z "${MACOS_CERTIFICATE_APPLICATION_ID}" ]; then
+        echo "Error: MACOS_CERTIFICATE_APPLICATION_ID not set" >&2
+        exit 1
+    fi
+
+    echo "-- Signing bundle ..."
     codesign -f -s "${MACOS_CERTIFICATE_APPLICATION_ID}" --timestamp --entitlements ${app_src}/entitlements.plist.app ${bundle}
+
 else
     usage
     exit 1
 fi
 
-echo "== Uploading for notarization ..."
-
-tmp=/tmp/$(basename $0).$$.pid
-trap "rm -f ${tmp}" EXIT
-
-xcrun altool --notarize-app --primary-bundle-id "org.zeek.zeek-agent" -u "${MACOS_NOTARIZATION_USER}" ${password} -t osx -f "${bundle}" | tee ${tmp}
-
-uuid=$(cat ${tmp} | grep "RequestUUID" | awk '{print $3}')
-if [ -z "${uuid}" ]; then
-    echo "Error: No UUID returned."
-    exit 1
-fi
-
-echo "== Waiting for confirmation on UUID ${uuid} ..."
-
-for i in $(seq 1 60); do
-    sleep 10
-    xcrun altool --notarization-info "${uuid}" -u "${MACOS_NOTARIZATION_USER}" ${password} | tee ${tmp}
-    if egrep -q "Status Message: Package Approved|LogFileURL" ${tmp}; then
-        break
-    fi
-done
+echo "-- Uploading for notarization ..."
 
-grep -q "Status Message: Package Approved" ${tmp}
+xcrun notarytool submit --keychain-profile "App Store Connect API - zeek-agent" --wait --timeout 20m "${bundle}"
 
-echo "== Stapling ..."
+echo "-- Stapling ..."
 
 xcrun stapler staple ${bundle}
 
-echo "== Verifying ..."
+echo "-- Verifying ..."
 
 spctl -a -vv -t install ${bundle}
 xcrun stapler validate ${bundle}
diff --git a/packaging/darwin/post-build.cmake b/packaging/darwin/post-build.cmake
index dc4da01a..b126b403 100644
--- a/packaging/darwin/post-build.cmake
+++ b/packaging/darwin/post-build.cmake
@@ -13,11 +13,10 @@ foreach (pkg "${CPACK_PACKAGE_FILES}")
     endforeach()
 endforeach()
 
-if ( NOT "$ENV{MACOS_NOTARIZATION_USER}" STREQUAL "")
-    message(STATUS "Notarizing application")
+if ( NOT "$ENV{MACOS_NOTARIZE}" STREQUAL "")
     foreach (pkg "${CPACK_PACKAGE_FILES}")
         execute_process(COMMAND ${CMAKE_CURRENT_LIST_DIR}/notarize application "${pkg}" COMMAND_ERROR_IS_FATAL ANY)
     endforeach()
 else ()
-    message(STATUS "Not notarizing application, MACOS_NOTARIZATION_USER not set")
+    message(STATUS "Not notarizing application, MACOS_NOTARIZE not set")
 endif()