diff --git a/.azure-pipelines/pyinstaller.yaml b/.azure-pipelines/pyinstaller.yaml
index 4bb2251bc..39d8ee8a6 100644
--- a/.azure-pipelines/pyinstaller.yaml
+++ b/.azure-pipelines/pyinstaller.yaml
@@ -15,6 +15,16 @@ steps:
     displayName: install libs
   - bash: python -m pip install .[pyinstaller] -c requirements/constraints_py3.12.txt
     displayName: install partseg
+  - bash: |
+      bash build_utils/build_libomp.sh
+    condition: startsWith(variables['Agent.OS'], 'Darwin')
+    displayName: install libomp
+    env:
+      MACOSX_DEPLOYMENT_TARGET: 10.15
+  - bash: |
+      python -m pip install git+https://github.com/4DNucleome/PartSegCore-compiled-backend.git@mso_fix
+    displayName: install PartSegCore-compiled-backend from `mso_fix` branch
+    # https://github.com/4DNucleome/PartSegCore-compiled-backend/tree/mso_fix
   - bash: |
       python  build_utils/create_and_pack_executable.py --no-simple-zip
     displayName: build
diff --git a/build_utils/build_libomp.sh b/build_utils/build_libomp.sh
new file mode 100644
index 000000000..fd2579778
--- /dev/null
+++ b/build_utils/build_libomp.sh
@@ -0,0 +1,19 @@
+#!/usr/bin/env bash
+set -euo pipefail
+DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
+build_dir=${DIR}/libs_build
+LLVM_VERSION=${LLVM_VERSION:-19.1.1}
+INSTALL_CMD=${INSTALL_CMD:-"sudo make install"}
+
+echo MACOSX_DEPLOYMENT_TARGET $MACOSX_DEPLOYMENT_TARGET
+
+git clone --depth 1 --branch llvmorg-${LLVM_VERSION} https://github.com/llvm/llvm-project
+pushd llvm-project/openmp
+mkdir build
+cd build
+cmake -DCMAKE_C_COMPILER=${CC:-clang} -DCMAKE_CXX_COMPILER=${CXX:-clang++} ${CMAKE_FLAGS:-} ..
+make ${MAKE_FLAGS:-}
+${INSTALL_CMD}
+
+popd
+rm -rf llvm-project
diff --git a/package/PartSegCore/segmentation/watershed.py b/package/PartSegCore/segmentation/watershed.py
index 4ad3bc245..c6bb3cc7c 100644
--- a/package/PartSegCore/segmentation/watershed.py
+++ b/package/PartSegCore/segmentation/watershed.py
@@ -183,7 +183,7 @@ def sprawl(
 
 
 class MSOWatershedParams(BaseModel):
-    step_limits: int = Field(100, ge=1, le=1000, title="Steep limits", description="Limits of Steps")
+    step_limits: int = Field(100, ge=1, le=10000, title="Steep limits", description="Limits of Steps")
     reflective: bool = False