diff --git a/rpm/nsd-app-wrap.spec b/rpm/nsd-app-wrap.spec
index a7d42cae2998c192838f0b2c120e7df289c64558..3cf8a528d16eb37d79c0341c6e9d6b15f67aa2e7 100644
--- a/rpm/nsd-app-wrap.spec
+++ b/rpm/nsd-app-wrap.spec
@@ -1,5 +1,5 @@
 Name:           nsd-app-wrap
-Version:        2.10
+Version:        2.11
 Release:        1%{?dist}
 Summary:        Wrapper scripts to launch python applications installed via anaconda
 Vendor:         Peter F. Peterson
@@ -40,6 +40,7 @@ install -m 755 mantidworkbenchqa                      %{buildroot}%{_bindir}/
 install -m 755 mantidpython                           %{buildroot}%{_bindir}/
 install -m 755 mantidworkbench                        %{buildroot}%{_bindir}/
 install -m 755 mantidtotalscattering                  %{buildroot}%{_bindir}/
+install -m 755 mcstas                                 %{buildroot}%{_bindir}/
 install -m 755 neutron-imaging                        %{buildroot}%{_bindir}/
 install -m 755 nr_launcher                            %{buildroot}%{_bindir}/
 install -m 755 nsd-app-wrap.sh                        %{buildroot}%{_bindir}/
@@ -66,6 +67,7 @@ install -m 644 desktop/jupyter.svg                    %{buildroot}/%{_datadir}/p
 install -m 644 desktop/mantid_workbench.png           %{buildroot}/%{_datadir}/pixmaps/
 install -m 644 desktop/mantid_workbenchnightly.png    %{buildroot}/%{_datadir}/pixmaps/
 install -m 644 desktop/mantid_workbenchqa.png         %{buildroot}/%{_datadir}/pixmaps/
+install -m 644 desktop/mcstas.png                     %{buildroot}/%{_datadir}/pixmaps/
 install -m 644 desktop/paraview.png                   %{buildroot}/%{_datadir}/pixmaps/
 install -m 644 desktop/pyrs.png                       %{buildroot}/%{_datadir}/pixmaps/
 install -m 644 desktop/pysen.png                      %{buildroot}/%{_datadir}/pixmaps/
@@ -82,6 +84,7 @@ install -m 644 desktop/jupyter.local.desktop           %{buildroot}%{_datadir}/a
 install -m 644 desktop/mantidworkbench.desktop         %{buildroot}%{_datadir}/applications/
 install -m 644 desktop/mantidworkbenchnightly.desktop  %{buildroot}%{_datadir}/applications/
 install -m 644 desktop/mantidworkbenchqa.desktop       %{buildroot}%{_datadir}/applications/
+install -m 644 desktop/mcstas.desktop                  %{buildroot}%{_datadir}/applications/
 install -m 644 desktop/paraview.desktop                %{buildroot}%{_datadir}/applications/
 install -m 644 desktop/pyrs.desktop                    %{buildroot}%{_datadir}/applications/
 install -m 644 desktop/quicknxs.desktop                %{buildroot}%{_datadir}/applications/
@@ -101,6 +104,9 @@ install -m 644 desktop/ibeatles.desktop                %{buildroot}%{_datadir}/a
 %{_prefix}/share/applications/*
 
 %changelog
+* Thu Dec 04 2025 Daniel Caballero
+- Added McStas
+
 * Mon Oct 27 2025 Glass Elsarboukh
 - Refl1d prod no longer an alias for qa
 
diff --git a/src/desktop/mcstas.desktop b/src/desktop/mcstas.desktop
new file mode 100644
index 0000000000000000000000000000000000000000..1eb7b770a99acf41ea52661e355ca08ae6c48d46
--- /dev/null
+++ b/src/desktop/mcstas.desktop
@@ -0,0 +1,11 @@
+[Desktop Entry]
+Name=McStas
+Comment=A neutron ray-trace simulation package
+GenericName=McStas
+Exec=/usr/bin/mcstas
+Terminal=false
+X-MultipleArgs=false
+Type=Application
+Categories=Science;Other
+Icon=mcstas
+StartupNotify=false
\ No newline at end of file
diff --git a/src/desktop/mcstas.png b/src/desktop/mcstas.png
new file mode 100644
index 0000000000000000000000000000000000000000..5ef319102b15a7634d34a239645d2fa501495095
Binary files /dev/null and b/src/desktop/mcstas.png differ
diff --git a/src/mcstas b/src/mcstas
new file mode 100644
index 0000000000000000000000000000000000000000..08387a60c8af932a84ef267fdd52f2c3f16acf7f
--- /dev/null
+++ b/src/mcstas
@@ -0,0 +1,15 @@
+#!/bin/bash
+
+# select the environment to use
+# current default is system version
+PIXI_ENVIRON=mctsas
+
+# import library to do the real work
+# shellcheck disable=SC1091
+. "$(dirname "$(realpath "$0")")/nsd-app-wrap.sh" \
+  || . /bin/nsd-app-wrap.sh
+
+# put together arguments - conda_env, application, argv
+args=("${PIXI_ENVIRON}" "start_gui" "$@")
+# launch the tool
+pixi_launch "${args[@]}"