diff --git a/README.md b/README.md
index 55e12ec4..136773d2 100644
--- a/README.md
+++ b/README.md
@@ -73,3 +73,43 @@ GOARM, PLATFORM_ID, CC, and CXX.
 1. Build the images from the project's root with `make`.
 1. Get a logon token for the container registry by visiting <https://docker.elastic.co:7000>.
 1. Publish the images with `make push`.
+
+## Packaging MacOS SDK
+
+The osxcross repository used to cross compile for MacOSX has [instructions for packaging the SDK](https://github.com/tpoechtrager/osxcross#packaging-the-sdk).
+
+The instructions for packaging the SDK on a Linux instance are:
+
+1. Clone the [osxcross](https://github.com/tpoechtrager/osxcross) repo.
+1. Install `clang`, `make`, `libssl-dev`, `lzma-dev`, `libxml2-dev`, `libbz2-dev`.
+1. Download [Xcode from Apple](Download Xcode: https://developer.apple.com/download/more]).
+1. Run `./tools/gen_sdk_package_pbzx.sh <xcode>.xip`.
+
+### bzip2 issues
+
+If the `gen_sdk_package_pbza.sh` script gives an error that reads:
+
+```
+Error while extracting archive:(Metadata): bzip2 support not compiled in. (Success)
+```
+
+A manual work-around is needed in order to create the SDK (other people have reported that installing `libbz2-dev` fixed this issue).
+
+First edit `osxcross/tools/tools.sh` to remove the `trap` line from the `create_tmp_dir` function (currently line 264).
+
+Then re-run  `./tools/gen_sdk_package_pbzx.sh <xcode>.xip`.
+
+Go to the tmp dir created in the build dir: `cd osxcross/build/tmp_<X>`.
+
+Then run:
+```
+../../target/SDK/tools/bin/pbzx -n Content | cpio -i
+cd ../..
+XCODEDIR=osxcross/build/tmp_<X> ./tools/gen_sdk_package.sh
+```
+
+The SDK should be in the working directory.
+The tmp dir can be safely deleted after this.
+
+The SDKs should be uploaded into the `gs://obs-ci-cache` bucket on GCP (Google Cloud Platform).
+This is accessible to authorized users in the `elastic-observability` project [here](https://console.cloud.google.com/storage/browser/obs-ci-cache).
diff --git a/go1.16/darwin/Dockerfile.tmpl b/go1.16/darwin/Dockerfile.tmpl
index f1bf226a..90dda583 100644
--- a/go1.16/darwin/Dockerfile.tmpl
+++ b/go1.16/darwin/Dockerfile.tmpl
@@ -8,14 +8,31 @@ RUN \
     && apt-get install -qq -y --no-install-recommends --allow-unauthenticated \
         clang \
         llvm \
+        cmake \
+        patch \
+        python \
+        libssl-dev \
+        libxml2-dev \
+        lzma-dev \
+        llvm-dev \
+        uuid-dev \
     && rm -rf /var/lib/apt/lists/*
 
-ARG OSXCROSS_SDK_URL=https://s3.amazonaws.com/beats-files/deps/MacOSX10.11.sdk.tar.xz
+{{if eq .DEBIAN_VERSION "10"}}
+ARG OSXCROSS_SDK_URL=https://storage.googleapis.com/obs-ci-cache/beats/MacOSX10.14.sdk.tar.xz
+ARG OSXCROSS_PATH=/usr/osxcross
+ARG OSXCROSS_REV=8a716a43a72dab1db9630d7824ee0af3730cb8f9
+ARG SDK_VERSION=10.14
+ARG DARWIN_VERSION=17
+ARG OSX_VERSION_MIN=10.14
+{{ else }}
+ARG OSXCROSS_SDK_URL=https://storage.googleapis.com/obs-ci-cache/beats/MacOSX10.11.sdk.tar.xz
 ARG OSXCROSS_PATH=/usr/osxcross
 ARG OSXCROSS_REV=3034f7149716d815bc473d0a7b35d17e4cf175aa
 ARG SDK_VERSION=10.11
 ARG DARWIN_VERSION=15
 ARG OSX_VERSION_MIN=10.10
+{{ end }}
 
 RUN \
     mkdir -p /tmp/osxcross && cd /tmp/osxcross \
@@ -27,6 +44,8 @@ RUN \
     && rm -rf /tmp/osxcross "/usr/osxcross/SDK/MacOSX${SDK_VERSION}.sdk/usr/share/man"
 
 ENV PATH $OSXCROSS_PATH/bin:$PATH
+# Add osxcross libraries to the library PATH
+ENV LD_LIBRARY_PATH /usr/osxcross/lib:$LD_LIBRARY_PATH
 
 COPY rootfs /
 
@@ -36,11 +55,14 @@ RUN cd / \
   && file helloWorld \
   && file helloWorld | grep -c 'Mach-O 64-bit x86_64'
 
+# MacOSX10.14 SDK does not have 32bits compiler
+{{if ne .DEBIAN_VERSION "10"}}
 RUN cd / \
   && o32-clang helloWorld.c -o helloWorld \
   && file helloWorld \
   && file helloWorld | grep -c 'Mach-O i386' \
   && rm helloWorld.c helloWorld
+{{ end }}
 
 # Build-time metadata as defined at http://label-schema.org.
 ARG BUILD_DATE