diff --git a/.github/workflows/ci-osx.yml b/.github/workflows/ci-osx.yml
deleted file mode 100644
index 332fb8af..00000000
--- a/.github/workflows/ci-osx.yml
+++ /dev/null
@@ -1,71 +0,0 @@
-# **********************************************************
-# Copyright (c) 2020-2022 Google, Inc.  All rights reserved.
-# **********************************************************
-
-# Dr. Memory: the memory debugger
-#
-# This library is free software; you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation;
-# version 2.1 of the License, and no later version.
-#
-# This library is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-# Library General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this library; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
-
-# Github Actions workflow for Mac OSX Continuous Integration testing.
-
-name: ci-osx
-on:
-  # Run on pushes to master and on pull request changes, including from a
-  # forked repo with no "push" trigger, while avoiding duplicate triggers.
-  push:
-    branches:
-      - master
-  pull_request:
-    types: [opened, reopened, synchronize]
-
-  # Manual trigger using the Actions page. May remove when integration complete.
-  workflow_dispatch:
-
-defaults:
-  run:
-    shell: bash
-
-jobs:
-  # 64-bit OSX build with clang and tests:
-  osx-x86-64:
-    runs-on: macos-11
-
-    steps:
-    - uses: actions/checkout@v2
-      with:
-        submodules: recursive
-
-    # Cancel any prior runs for a PR (but do not cancel master branch runs).
-    - uses: n1hility/cancel-previous-runs@v2
-      with:
-        token: ${{ secrets.GITHUB_TOKEN }}
-      if: ${{ github.event_name == 'pull_request' }}
-
-    - name: Fetch Sources
-      run: git fetch --no-tags --depth=1 origin master
-
-    - name: Create Build Environment
-      run: brew install nasm zlib snappy lz4
-
-    - name: Run Suite
-      working-directory: ${{ github.workspace }}
-      run: ./tests/runsuite_wrapper.pl travis
-      env:
-        # Change xcode version for current session:
-        # https://www.unix.com/man-page/osx/1/xcode-select/
-        # https://github.community/t/selecting-an-xcode-version/16204/3
-        # To find available versions, add the following as a step above:
-        #  - run: ls -l /Applications
-        DEVELOPER_DIR: /Applications/Xcode_13.2.1.app/Contents/Developer
diff --git a/.github/workflows/ci-package.yml b/.github/workflows/ci-package.yml
index e31c1e28..f4b109e5 100644
--- a/.github/workflows/ci-package.yml
+++ b/.github/workflows/ci-package.yml
@@ -120,52 +120,7 @@ jobs:
 
   ###########################################################################
   # Mac tarball with x86-64 build:
-  osx:
-    runs-on: macos-11
-
-    steps:
-    - uses: actions/checkout@v2
-      with:
-        submodules: recursive
-
-    - name: Fetch Sources
-      run: git fetch --no-tags --depth=1 origin master
-
-    - name: Create Build Environment
-      run: brew install nasm zlib snappy lz4
-
-    - name: Get Version
-      id: version
-      # XXX: See x86 job comments on sharing the default ver# with CMakeLists.txt.
-      run: |
-        if test -z "${{ github.event.inputs.version }}"; then
-          export PATCHLEVEL=$((`git log -n 1 --format=%ct` / (60*60*24)))
-          export PATCHLEVEL=$(((PATCHLEVEL %200) + 56))
-          export VERSION_NUMBER="2.6.${PATCHLEVEL}"
-          export PREFIX="cronbuild-"
-        else
-          export VERSION_NUMBER=${{ github.event.inputs.version }}
-          export PREFIX="release_"
-        fi
-        if [ "${{ github.event.inputs.build }}" -ne 0 ]; then
-          export VERSION_NUMBER="${VERSION_NUMBER}-${{ github.event.inputs.build }}"
-        fi
-        echo "::set-output name=version_number::${VERSION_NUMBER}"
-
-    - name: Build Package
-      working-directory: ${{ github.workspace }}
-      run: ./tests/runsuite_wrapper.pl travis
-      env:
-        CI_TARGET: package
-        VERSION_NUMBER: ${{ steps.version.outputs.version_number }}
-        # See ci-osx.yml comments: we need to set the xcode version.
-        DEVELOPER_DIR: /Applications/Xcode_13.2.1.app/Contents/Developer
-
-    - name: Upload Artifacts
-      uses: actions/upload-artifact@v2
-      with:
-        name: mac-tarball
-        path: DrMemory-MacOS-${{ steps.version.outputs.version_number }}.tar.gz
+  # TODO i#2511: re-enable once it works on macos-12.
 
   ###########################################################################
   # Windows .zip and .msi with 32-bit and 64-bit x86 builds: