diff --git a/bin/compose b/bin/compose
index 70796a0..55d91d5 100755
--- a/bin/compose
+++ b/bin/compose
@@ -7,8 +7,22 @@
 ## Launcher
 ##  - should need minimum requirement to run
 ##    - no shell libs
-## 
+##
+
+
+get_os() {
+    local uname_output machine
 
+    uname_output="$(uname -s)"
+    case "${uname_output}" in
+        Linux*)   machine=linux;;
+        Darwin*)  machine=mac;;
+        CYGWIN*)  machine=cygwin;;
+        MINGW*)   machine=mingw;;
+        *)        machine="UNKNOWN:${uname_output}"
+    esac
+    echo "${machine}"
+}
 
 
 read-0() {
@@ -49,7 +63,7 @@ is_volume_used() {
 
 
 clean_unused_sessions() {
-    for f in /var/lib/compose/sessions/*; do
+    for f in "$COMPOSE_VAR/sessions/"*; do
         [ -e "$f" ] || continue
         is_volume_used "$f" && continue
         rm -f "$f"
@@ -75,10 +89,10 @@ mk_docker_run_options() {
     docker_run_opts=("-v" "/var/run/docker.sock:/var/run/docker.sock")
 
     ## CACHE/DATA DIRS
-    docker_run_opts+=("-v" "/var/lib/compose:/var/lib/compose")
-    docker_run_opts+=("-v" "/var/cache/compose:/var/cache/compose")
+    docker_run_opts+=("-v" "$COMPOSE_VAR:/var/lib/compose")
+    docker_run_opts+=("-v" "$COMPOSE_CACHE:/var/cache/compose")
 
-    docker_run_opts+=("-v" "/etc/timezone:/etc/timezone:ro")
+    docker_run_opts+=("-v" "$TZ_PATH:/etc/timezone:ro")
 
 
     ## current dir
@@ -91,7 +105,7 @@ mk_docker_run_options() {
                     cd ..
                 done
              ); then
-        docker_path=/var/lib/compose/root/$(basename "$parent")
+        docker_path=$COMPOSE_VAR/root/$(basename "$parent")
         docker_run_opts+=("-v" "$parent:$docker_path:ro" \
                                "-w" "$docker_path")
     fi
@@ -133,7 +147,11 @@ mk_docker_run_options() {
     [ -L "$CHARM_STORE" ] && {
         CHARM_STORE=$(readlink "$CHARM_STORE") || exit 1
     }
-    docker_run_opts+=("-v" "$CHARM_STORE:/srv/charm-store:ro")
+    docker_run_opts+=(
+        "-v" "$CHARM_STORE:/srv/charm-store:ro"
+        "-e" "CHARM_STORE=/srv/charm-store"
+        "-e" "HOST_CHARM_STORE=$CHARM_STORE"
+    )
     relink_subdirs /srv/charm-store/*
 
     ## DEFAULT_COMPOSE_FILE
@@ -148,21 +166,30 @@ mk_docker_run_options() {
     ## COMPOSE_YML_FILE
     if [ "${COMPOSE_YML_FILE+x}" ]; then
         if [ -e "${COMPOSE_YML_FILE}" ]; then
-            docker_run_opts+=("-v" "$COMPOSE_YML_FILE:/tmp/compose.yml:ro")
-            docker_run_opts+=("-e" "COMPOSE_YML_FILE=/tmp/compose.yml")
+            docker_run_opts+=(
+                "-v" "$COMPOSE_YML_FILE:/tmp/compose.yml:ro"
+                "-e" "COMPOSE_YML_FILE=/tmp/compose.yml"
+                "-e" "HOST_COMPOSE_YML_FILE=/tmp/compose.yml"
+            )
         fi
     fi
 
     ## DATASTORE
     if [ "${DATASTORE+x}" ]; then
-        docker_run_opts+=("-v" "$DATASTORE:/srv/datastore/data:rw")
-        docker_run_opts+=("-e" "DATASTORE=/srv/datastore/data")
+        docker_run_opts+=(
+            "-v" "$DATASTORE:/srv/datastore/data:rw"
+            "-e" "DATASTORE=/srv/datastore/data"
+            "-e" "HOST_DATASTORE=$DATASTORE"
+        )
     fi
 
     ## CONFIGSTORE
     if [ "${CONFIGSTORE+x}" ]; then
-        docker_run_opts+=("-v" "$CONFIGSTORE:/srv/datastore/config:rw")
-        docker_run_opts+=("-e" "CONFIGSTORE=/srv/datastore/config")
+        docker_run_opts+=(
+            "-v" "$CONFIGSTORE:/srv/datastore/config:rw"
+            "-e" "CONFIGSTORE=/srv/datastore/config"
+            "-e" "HOST_CONFIGSTORE=$CONFIGSTORE"
+        )
     fi
 
     docker_run_opts+=("-v" "$HOME/.docker:/root/.docker")
@@ -178,19 +205,43 @@ mk_docker_run_options() {
     } > "$filename"
     sha=$(sha256sum "$filename")
     sha=${sha:0:64}
-    dest="/var/lib/compose/sessions/$sha"
+    dest="$COMPOSE_VAR/sessions/$sha"
     {
         printf "%s\0" "-v" "$dest:$dest"
         printf "%s\0" "-e" "COMPOSE_LAUNCHER_OPTS=$dest"
         printf "%s\0" "-e" "COMPOSE_LAUNCHER_BIN=$COMPOSE_LAUNCHER_BIN"
     } >> "$filename"
-    mkdir -p /var/lib/compose/sessions
+    mkdir -p "$COMPOSE_VAR"/sessions
     mv "$filename" "$dest"
     echo "$dest"
 }
 
 
 run() {
+    local os docker_run_opts
+
+    os=$(get_os)
+    case "$os" in
+        linux)
+            COMPOSE_VAR=/var/lib/compose
+            COMPOSE_CACHE=/var/cache/compose
+            ;;
+        mac)
+            if ! [ -e "$HOME/.compose/etc/timezone" ]; then
+                TZ=${TZ:-"Europe/Paris"}
+                echo "$TZ" > "$HOME"/.compose/etc/timezone
+            fi
+            TZ_PATH="$HOME"/.compose/etc/timezone
+            COMPOSE_VAR="$HOME"/.compose/lib
+            COMPOSE_CACHE="$HOME"/.compose/cache
+            ;;
+        *)
+            echo "System '$os' not supported yet." >&2
+            exit 1
+            ;;
+    esac
+
+
     docker_run_opts=()
     if [ -z "$COMPOSE_LAUNCHER_OPTS" ]; then
         clean_unused_sessions
diff --git a/bin/compose-core b/bin/compose-core
index 34b2a61..5be316f 100755
--- a/bin/compose-core
+++ b/bin/compose-core
@@ -731,7 +731,11 @@ ensure_db_docker_running () {
 
     docker rm "$_DB_NAME" 2>/dev/null || true
 
-    host_db_working_dir="$DATASTORE/${SERVICE_NAME}$DB_DATADIR"
+    if [ "${HOST_DATASTORE+x}" ]; then
+        host_db_working_dir="$HOST_DATASTORE/${SERVICE_NAME}$DB_DATADIR"
+    else
+        host_db_working_dir="$DATASTORE/${SERVICE_NAME}$DB_DATADIR"
+    fi
 
     if is_db_locked; then
         info "Some process is using '$host_db_working_dir'. Trying to find a docker that would do this..."