diff --git a/.github/workflows/plot_observables.yaml b/.github/workflows/plot_observables.yaml
index 9068a2ea..b5b057e3 100644
--- a/.github/workflows/plot_observables.yaml
+++ b/.github/workflows/plot_observables.yaml
@@ -4,7 +4,7 @@ on:
   push:
     branches:
       - main
-      - XSCAPE-1.1.4-RC
+      - XSCAPE-1.1.5-RC
 
 env:
   PULL_NUMBER: ${{ github.event.number }}
diff --git a/.github/workflows/smash_test_completes.yaml b/.github/workflows/smash_test_completes.yaml
index f45106a3..ed3305a6 100644
--- a/.github/workflows/smash_test_completes.yaml
+++ b/.github/workflows/smash_test_completes.yaml
@@ -4,12 +4,12 @@ on:
   pull_request:
     branches:
       - main
-      - XSCAPE-1.1.4-RC
+      - XSCAPE-1.1.5-RC
 
   push:
     branches:
       - main
-      - XSCAPE-1.1.4-RC
+      - XSCAPE-1.1.5-RC
 
 env:
   REPO_NAME: ${{ github.event.repository.name }}
diff --git a/.github/workflows/test-build-external.yaml b/.github/workflows/test-build-external.yaml
index 057a5425..4340957e 100644
--- a/.github/workflows/test-build-external.yaml
+++ b/.github/workflows/test-build-external.yaml
@@ -4,12 +4,12 @@ on:
   pull_request:
     branches:
       - main
-      - XSCAPE-1.1.4-RC
+      - XSCAPE-1.1.5-RC
 
   push:
     branches:
       - main
-      - XSCAPE-1.1.4-RC
+      - XSCAPE-1.1.5-RC
 
 env:
   REPO_NAME: ${{ github.event.repository.name }}
diff --git a/.github/workflows/test-build-macos-native.yaml b/.github/workflows/test-build-macos-native.yaml
new file mode 100644
index 00000000..b2349b1e
--- /dev/null
+++ b/.github/workflows/test-build-macos-native.yaml
@@ -0,0 +1,106 @@
+name: test build macOS native
+
+on:
+  pull_request:
+    branches:
+      - main
+      - XSCAPE-1.1.5-RC
+      - latessa/gtl_binary_function
+
+  push:
+    branches:
+      - main
+      - XSCAPE-1.1.5-RC
+      - latessa/gtl_binary_function
+
+env:
+  REPO_NAME: ${{ github.event.repository.name }}
+
+jobs:
+  build:
+    name: install packages and build
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [macos-14, macos-15]
+
+    steps:
+
+    - name: brew install dependencies
+      run: |
+        export NONINTERACTIVE=1
+        brew update
+        brew cleanup
+        brew install --formula cmake
+        brew install --formula doxygen
+        brew install --formula root
+        brew install --formula graph-tool
+        brew install --formula hdf5
+        brew install --formula open-mpi
+        brew install --formula gsl
+        brew install --formula boost
+        brew install --formula zlib
+        . /opt/homebrew/bin/thisroot.sh
+    - name: set environment variables
+      run: |
+        export ROOTSYS="/usr/local/root"
+        export PATH="$ROOTSYS/bin:\$PATH"
+        export LD_LIBRARY_PATH="$ROOTSYS/lib:$LD_LIBRARY_PATH"
+        export PYTHONPATH="$ROOTSYS/lib"
+    - name: install HepMC 3.2.6
+      run: | # brew tap davidchall/hep
+        brew tap davidchall/homebrew-hep
+        cd $(brew --repository)/Library/Taps/davidchall/homebrew-hep
+        echo "Current directory: $(pwd)"
+        git checkout f643d5cacc19fd0b01d0ecba0daf30452152da03
+        NONINTERACTIVE=1 brew install davidchall/hep/hepmc3
+    - name: install Pythia 8309
+      run: |
+        cd $(brew --repository)/Library/Taps/davidchall/homebrew-hep
+        echo "Current directory: $(pwd)"
+        git checkout 141f8548d045df88d498ab44df16d2091742e4b1
+        NONINTERACTIVE=1 brew install davidchall/hep/pythia
+    - name: set more variables
+      run: |
+        export JETSCAPE_DIR="${GITHUB_WORKSPACE}/${REPO_NAME}"
+    - name: Checkout JETSCAPE Repository
+      uses: actions/checkout@v4
+      with:
+        path: ${{ github.event.repository.name }}
+
+    - name: Download MUSIC
+      run: |
+        cd ${GITHUB_WORKSPACE}/${REPO_NAME}/external_packages
+        ./get_music.sh
+    - name: Download ISS
+      run: |
+        cd ${GITHUB_WORKSPACE}/${REPO_NAME}/external_packages
+        ./get_iSS.sh
+    - name: Download FREESTREAM
+      run: |
+        cd ${GITHUB_WORKSPACE}/${REPO_NAME}/external_packages
+        ./get_freestream-milne.sh
+    - name: Download SMASH
+      run: |
+        export PYTHIA8DIR="/opt/homebrew/opt/pythia"
+        cd ${GITHUB_WORKSPACE}/${REPO_NAME}/external_packages
+        ./get_smash.sh
+    - name: Download 3DGlauber
+      run: |
+        cd ${GITHUB_WORKSPACE}/${REPO_NAME}/external_packages
+        ./get_3dglauber.sh
+    - name: Build Application
+      run: |
+        cd ${GITHUB_WORKSPACE}/${REPO_NAME}
+        mkdir build
+        cd build
+        export SMASH_DIR="${GITHUB_WORKSPACE}/${REPO_NAME}/external_packages/smash/smash_code"
+        echo "This is SMASH_DIR: "
+        echo ${SMASH_DIR}
+        ls ${SMASH_DIR}
+        cmake .. -DUSE_3DGlauber=ON -DUSE_MUSIC=ON -DUSE_ISS=ON -DUSE_FREESTREAM=ON -DUSE_SMASH=ON
+        make -j2
+    - name: Test Run
+      run: |
+        cd ${GITHUB_WORKSPACE}/${REPO_NAME}/build
+        ./runJetscape ../config/publications_config/arXiv_1910.05481/jetscape_user_PP_1910.05481.xml
diff --git a/.github/workflows/test-events-PbPb.yaml b/.github/workflows/test-events-PbPb.yaml
index 5631b397..785e1b14 100644
--- a/.github/workflows/test-events-PbPb.yaml
+++ b/.github/workflows/test-events-PbPb.yaml
@@ -4,12 +4,12 @@ on:
   pull_request:
     branches:
       - main
-      - XSCAPE-1.1.4-RC
+      - XSCAPE-1.1.5-RC
 
   push:
     branches:
       - main
-      - XSCAPE-1.1.4-RC
+      - XSCAPE-1.1.5-RC
 
 env:
   REPO_NAME: ${{ github.event.repository.name }}
diff --git a/.github/workflows/test-events-Pythia-Isr-Dat.yaml b/.github/workflows/test-events-Pythia-Isr-Dat.yaml
index 4ef2c2a3..dc5189b1 100644
--- a/.github/workflows/test-events-Pythia-Isr-Dat.yaml
+++ b/.github/workflows/test-events-Pythia-Isr-Dat.yaml
@@ -6,12 +6,12 @@ on:
   pull_request:
     branches:
       - main
-      - XSCAPE-1.1.4-RC
+      - XSCAPE-1.1.5-RC
 
   push:
     branches:
       - main
-      - XSCAPE-1.1.4-RC
+      - XSCAPE-1.1.5-RC
 
 env:
   REPO_NAME: ${{ github.event.repository.name }}
diff --git a/.github/workflows/test-events-Pythia-Isr-Hadron.yaml b/.github/workflows/test-events-Pythia-Isr-Hadron.yaml
index ce989ee7..a8b6e59a 100644
--- a/.github/workflows/test-events-Pythia-Isr-Hadron.yaml
+++ b/.github/workflows/test-events-Pythia-Isr-Hadron.yaml
@@ -4,12 +4,12 @@ on:
   pull_request:
     branches:
       - main
-      - XSCAPE-1.1.4-RC
+      - XSCAPE-1.1.5-RC
 
   push:
     branches:
       - main
-      - XSCAPE-1.1.4-RC
+      - XSCAPE-1.1.5-RC
 
 env:
   REPO_NAME: ${{ github.event.repository.name }}
diff --git a/.github/workflows/test-events-Pythia-Isr-Parton.yaml b/.github/workflows/test-events-Pythia-Isr-Parton.yaml
index 5c0ba11f..84398388 100644
--- a/.github/workflows/test-events-Pythia-Isr-Parton.yaml
+++ b/.github/workflows/test-events-Pythia-Isr-Parton.yaml
@@ -4,12 +4,12 @@ on:
   pull_request:
     branches:
       - main
-      - XSCAPE-1.1.4-RC
+      - XSCAPE-1.1.5-RC
 
   push:
     branches:
       - main
-      - XSCAPE-1.1.4-RC
+      - XSCAPE-1.1.5-RC
 
 env:
   REPO_NAME: ${{ github.event.repository.name }}
diff --git a/.github/workflows/test-events-brick.yaml b/.github/workflows/test-events-brick.yaml
index ec7a1a37..789cb2de 100644
--- a/.github/workflows/test-events-brick.yaml
+++ b/.github/workflows/test-events-brick.yaml
@@ -4,13 +4,13 @@ on:
   pull_request:
     branches:
       - main
-      - XSCAPE-1.1.4-RC
+      - XSCAPE-1.1.5-RC
       - brick_matter_lbt
 
   push:
     branches:
       - main
-      - XSCAPE-1.1.4-RC
+      - XSCAPE-1.1.5-RC
       - brick_matter_lbt
 
 env:
diff --git a/.github/workflows/test-events-pp.yaml b/.github/workflows/test-events-pp.yaml
index 9cf8d4da..f18e6240 100644
--- a/.github/workflows/test-events-pp.yaml
+++ b/.github/workflows/test-events-pp.yaml
@@ -4,12 +4,12 @@ on:
   pull_request:
     branches:
       - main
-      - XSCAPE-1.1.4-RC
+      - XSCAPE-1.1.5-RC
 
   push:
     branches:
       - main
-      - XSCAPE-1.1.4-RC
+      - XSCAPE-1.1.5-RC
 
 env:
   REPO_NAME: ${{ github.event.repository.name }}
diff --git a/README.md b/README.md
index 5b39047a..21bbdb93 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# X-SCAPE 1.1.4
+# X-SCAPE 1.1.5
 
 The X-ion collisions with a Statistically and Computationally Advanced Program Envelope (X-SCAPE) is the enhanced (and 2nd) project of the JETSCAPE
 collaboration which extends the framework to include small systems created in p-A and p-p collisions, lower energy heavy-ion collisions and electron-Ion collisions.
diff --git a/external_packages/gtl/include/GTL/GTL.h b/external_packages/gtl/include/GTL/GTL.h
index 8e5af28a..9ed9993f 100755
--- a/external_packages/gtl/include/GTL/GTL.h
+++ b/external_packages/gtl/include/GTL/GTL.h
@@ -163,7 +163,6 @@ using std::stack;
 using std::map;
 using std::set;
 using std::allocator;
-using std::binary_function;
 using std::ostream;
 using std::ofstream;
 using std::cout;
diff --git a/external_packages/gtl/src/bid_dijkstra.cpp b/external_packages/gtl/src/bid_dijkstra.cpp
index d0c6077d..1c20d44a 100755
--- a/external_packages/gtl/src/bid_dijkstra.cpp
+++ b/external_packages/gtl/src/bid_dijkstra.cpp
@@ -30,7 +30,7 @@ __GTL_BEGIN_NAMESPACE
  * @internal
  * Binary predicate that compares two nodes according to their distance.
  */
-class less_dist : public binary_function<node, node, bool>
+class less_dist
 {
 public:
     /**
diff --git a/external_packages/gtl/src/dijkstra.cpp b/external_packages/gtl/src/dijkstra.cpp
index 57f6e135..0722d485 100755
--- a/external_packages/gtl/src/dijkstra.cpp
+++ b/external_packages/gtl/src/dijkstra.cpp
@@ -30,7 +30,7 @@ __GTL_BEGIN_NAMESPACE
  * @internal
  * Binary predicate that compares two nodes according to their distance.
  */
-class less_dist : public binary_function<node, node, bool>
+class less_dist
 {
 public:
     /**