diff --git a/README.md b/README.md
index d48097f..6997355 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@ Following packages are expected:
 - `curl`
 - `jq`
 - `awk`
-- `date` with microsecond support. On *alpine* this means installing `coreutils`
+- `date` with microsecond support. On *alpine* and *macOS* this means installing `coreutils`
 - `bash` > 4.0
 - `git` only if you use GitLab
 
@@ -312,7 +312,9 @@ Please look at [.gitlab-ci.yml.example](.gitlab-ci.yml.example)
       + `saas-linux-small-amd64` (GitLab)
   + Generic
       + `alpine` (Install dependencies before - See above)
-  + Also Windows and macOS are currently not supported.
+  + *macOS* is working on our local test machines (see install details below). 
+      + Runners on GitHub are untested, but should work. You need to create a power profile though (see Cloud Energy below). We are happy for beta testers! contact us :)
+  + Windows is currently only supported with WSL2
 
 - If you use Alpine, you must install coreutils so that time logging with date is possible with an accuracy of microseconds (`apk add coreutils`)
 
@@ -326,7 +328,7 @@ See also our [work on analysing fixed frequency in Cloud Providers and CI/CD](ht
 
 ### Note on the integration / Auto-Updates
 - If you want the extension to automatically update within a version number, use the convenient @vX form. 
-  + `uses: green-coding-solutions/eco-ci-energy-estimation@v4 # will pick the latest minor v3.x`
+  + `uses: green-coding-solutions/eco-ci-energy-estimation@v4 # will pick the latest minor v4.x`
   + In case of a major change from @v4 to @v5 you need to upgrade manually. The upside is: If you use dependabot it will create a PR for you as it understands the notation
     
 - If you want to pin the dependency and want to audit every release we recommend using the hash notation
@@ -338,7 +340,38 @@ See also our [work on analysing fixed frequency in Cloud Providers and CI/CD](ht
   + We do **not** recommend this as it might contain beta features. We recommend using the releases and tagged versions only
 
 
-### Testing
+### macOS
+
+*macOS* requires the *GNU* `date` tool so it can properly create a microsecond timestamp.
+
+Install it with the package manager of your choice and then add its binary first in the `PATH` variable, so that it precedes the *BSD* `date`.
+
+Example for `homebrew`:
+```bash
+brew install coreutils
+export PATH="/opt/homebrew/opt/coreutils/libexec/gnubin:$PATH"
+# then you can run:
+bash local_ci.example.sh
+```
+
+### Local CI / Running in docker
+
+Although initially designed for use in *GitHub Actions* and *GitLab Pipelines* the Eco-CI tool works everywhere where `bash` works.
+
+This means you can just use it locally by following it's general 3-step interface:
+- Start
+- Measure (optionally repeat if you want to lap multiple steps)
+- End & Display
+
+As an example we have set up a full example pipeline in the form of a `bash` file under `local_ci.example.sh`.
+
+In this file you find the needed calls along with some fake activity like calls to `sleep` and `ls` etc.
+
+You just need to slice the file to you needs and bring the code that you want to encapsulate with Eco-CI into the positions where currently the `sleep` and `ls` calls are.
+
+
+
+### Trying out with Docker and Circle-CI image
 
 For local testing you can just run in the docker container of your choice, directly from the root of the repository.
 
@@ -350,7 +383,8 @@ docker run --network host --rm -it -v ./:/tmp/data:ro cimg/base:current bash /tm
 In case you are testing with a local installation of the GMT append `--network host` to access `api.green-coding.internal`
 
 
-### Testing for KDE pipelines
+### Trying out with Docker and KDE pipelines
 ```bash
 docker run --rm -it -v ./:/tmp/data:ro invent-registry.kde.org/sysadmin/ci-images/suse-qt67:latest bash /tmp/data/local_ci.example.sh
 ```
+
diff --git a/scripts/cpu-utilization.sh b/scripts/cpu-utilization-linux.sh
similarity index 100%
rename from scripts/cpu-utilization.sh
rename to scripts/cpu-utilization-linux.sh
diff --git a/scripts/cpu-utilization-macos.sh b/scripts/cpu-utilization-macos.sh
new file mode 100644
index 0000000..eda47da
--- /dev/null
+++ b/scripts/cpu-utilization-macos.sh
@@ -0,0 +1,32 @@
+#!/usr/bin/env bash
+# By ChatGPT and masterfully adapted by Arne Tarara. No rights reserved :)
+
+iostat -w 1 | awk -v date_cmd="gdate +%s%N" '
+NR > 3 { # skips first 3 rows, which contain header data and first average-only measurement
+    # Extract user, system, and idle CPU percentages
+    user = $3
+    sys = $4
+    idle = $6
+
+    # Calculate total CPU usage
+    usage = 100 - idle
+
+    # Get the current time in seconds with microseconds
+    cmd = date_cmd
+    cmd | getline current_time_ns
+    close(cmd)
+
+    # Calculate the time difference
+    if (last_time_ns != "") {
+        time_diff_ns = current_time_ns - last_time_ns
+    } else {
+        time_diff_ns = 1000000000 # No difference for the first line
+    }
+
+    # Print the time and CPU usage
+    printf "%.10f %.2f\n", (time_diff_ns / 1000000000), usage
+
+
+    # Store the current time as the last time for the next iteration
+    last_time_ns = current_time_ns
+}'
\ No newline at end of file
diff --git a/scripts/make_measurement.sh b/scripts/make_measurement.sh
index 7817034..7830842 100755
--- a/scripts/make_measurement.sh
+++ b/scripts/make_measurement.sh
@@ -13,11 +13,13 @@ function make_inference() {
     # clear energy file for step because we fill it later anew
     echo > /tmp/eco-ci/energy-step.txt
 
+    power_data_file_path="$(dirname "$0")/../machine-power-data/${ECO_CI_MACHINE_POWER_DATA}"
+
     # bash mode inference is slower in initi<al reading
     # but 100x faster in reading. The net gain is after ~ 5 measurements
     if [[ -n "$BASH_VERSION" ]] && (( ${BASH_VERSION:0:1} >= 4 )); then
         echo "Using bash mode inference"
-        source "$(dirname "$0")/../machine-power-data/${ECO_CI_MACHINE_POWER_DATA}" # will set cloud_energy_hashmap
+        source "${power_data_file_path}" # will set cloud_energy_hashmap
 
         while read -r read_var_time read_var_util; do
             echo "${read_var_time} ${cloud_energy_hashmap[$read_var_util]}" | awk '{printf "%.9f\n", $1 * $2}' >> /tmp/eco-ci/energy-step.txt
@@ -26,7 +28,8 @@ function make_inference() {
         echo 'Using legacy mode inference'
         while read -r read_var_time read_var_util; do
             # The pattern contains a . and [ ] but this no problem as no other dot appears anywhere
-            power_value=$(awk -F "=" -v pattern="cloud_energy_hashmap\\[${read_var_util}\\]" ' $0 ~ pattern { print $2 }' $ECO_CI_MACHINE_POWER_DATA)
+
+            power_value=$(awk -F "=" -v pattern="cloud_energy_hashmap\\\\[${read_var_util}\\\\]" ' $0 ~ pattern { print $2 }' "${power_data_file_path}")
             echo "${read_var_time} ${power_value}" | awk '{printf "%.9f\n", $1 * $2}' >> /tmp/eco-ci/energy-step.txt
         done < /tmp/eco-ci/cpu-util-temp.txt
     fi
diff --git a/scripts/setup.sh b/scripts/setup.sh
index e04528c..880672b 100755
--- a/scripts/setup.sh
+++ b/scripts/setup.sh
@@ -83,11 +83,19 @@ function lap_measurement {
 
     # start writing cpu utilization with actual sleep durations
     end_measurement
-    bash "$(dirname "$0")/cpu-utilization.sh" > /tmp/eco-ci/cpu-util-step.txt 2> /dev/null < /dev/null &
+    if [[ $(uname) == "Darwin" ]]; then
+        bash "$(dirname "$0")/cpu-utilization-macos.sh" > /tmp/eco-ci/cpu-util-step.txt 2> /dev/null < /dev/null &
+    else
+        bash "$(dirname "$0")/cpu-utilization-linux.sh" > /tmp/eco-ci/cpu-util-step.txt 2> /dev/null < /dev/null &
+    fi
 }
 
 function end_measurement {
-    pkill -SIGTERM -f "$(dirname "$0")/cpu-utilization.sh"  || true;
+    if [[ $(uname) == "Darwin" ]]; then
+        pkill -SIGTERM -f "$(dirname "$0")/cpu-utilization-macos.sh"  || true;
+    else
+        pkill -SIGTERM -f "$(dirname "$0")/cpu-utilization-linux.sh"  || true;
+    fi
 }
 
 
diff --git a/scripts/vars.sh b/scripts/vars.sh
index 89792b2..bdb572e 100755
--- a/scripts/vars.sh
+++ b/scripts/vars.sh
@@ -23,15 +23,24 @@ function cpu_vars {
 
     machine_power_data="$1"
 
-    model_name=$(cat /proc/cpuinfo  | grep "model name" || true)
+    if [[ -f '/proc/cpuinfo' ]]; then
+        model_name=$(cat /proc/cpuinfo  | grep 'model name' || true)
 
-    echo "Machine has following CPU Model ${model_name}"
+        echo "Machine has following CPU Model ${model_name}"
 
-    echo "Full CPU Info"
-    cat /proc/cpuinfo
+        echo 'Full CPU Info'
+        cat /proc/cpuinfo
+    else
+      echo '/proc/cpuinfo is not accessible ... cannot dump CPU model info'
+      model_name='UNKNOWN'
+    fi
 
-    echo "Full memory info"
-    cat /proc/meminfo
+    if [[ -f '/proc/meminfo' ]]; then
+        echo 'Full memory info'
+        cat /proc/meminfo
+    else
+        echo '/proc/meminfo does not exist. Cannot dump memory info'
+    fi
 
 
     if [[ "$machine_power_data" == "github_EPYC_7763_4_CPU_shared.sh" ]]; then