diff --git a/columnphysics/icepack_algae.F90 b/columnphysics/icepack_algae.F90
index 7239edd1..a39b4a64 100644
--- a/columnphysics/icepack_algae.F90
+++ b/columnphysics/icepack_algae.F90
@@ -394,8 +394,7 @@ subroutine zbio   (dt,                        &
                                bio_index,                &
                                aicen,                    &
                                vicen,        vsnon,      &
-                               iphin,                    &! ntrcr
-                               trcrn,        aice_old,   &!aice_old
+                               iphin,        trcrn,      &
                                flux_bion,    flux_bio,   &
                                upNOn,        upNHn,      &
                                upNO,         upNH,       &
diff --git a/columnphysics/icepack_itd.F90 b/columnphysics/icepack_itd.F90
index 312dfb57..518d26ab 100644
--- a/columnphysics/icepack_itd.F90
+++ b/columnphysics/icepack_itd.F90
@@ -434,7 +434,6 @@ subroutine shift_ice (trcr_depend,           &
         worka, workb
 
       real (kind=dbl_kind), dimension(ncat) :: aicen_init
-      real (kind=dbl_kind), dimension(ncat) :: vicen_init
       real (kind=dbl_kind), dimension(ncat) :: vsnon_init
 
       character(len=*),parameter :: subname='(shift_ice)'
@@ -444,7 +443,6 @@ subroutine shift_ice (trcr_depend,           &
       !-----------------------------------------------------------------
 
       aicen_init(:) = aicen(:)
-      vicen_init(:) = vicen(:)
       vsnon_init(:) = vsnon(:)
 
       !-----------------------------------------------------------------
diff --git a/columnphysics/icepack_zbgc_shared.F90 b/columnphysics/icepack_zbgc_shared.F90
index 08c6753d..b7d3ec6e 100644
--- a/columnphysics/icepack_zbgc_shared.F90
+++ b/columnphysics/icepack_zbgc_shared.F90
@@ -588,8 +588,7 @@ subroutine merge_bgc_fluxes (dt,     &
                                bio_index,  &
                                aicen,      &
                                vicen,        vsnon,      &
-                               iphin,                    &
-                               trcrn,        aice_init,  &
+                               iphin,        trcrn,      &
                                flux_bion,    flux_bio,   &
                                upNOn,        upNHn,      &
                                upNO,         upNH,       &
@@ -618,8 +617,7 @@ subroutine merge_bgc_fluxes (dt,     &
       real (kind=dbl_kind), intent(in):: &
          aicen      , & ! concentration of ice
          vicen      , & ! volume of ice (m)
-         vsnon      , & ! volume of snow(m)
-         aice_init      ! initial concentration of ice
+         vsnon          ! volume of snow(m)
 
       ! single category rates
       real (kind=dbl_kind), dimension(:), intent(in):: &
diff --git a/doc/source/user_guide/ug_running.rst b/doc/source/user_guide/ug_running.rst
index ad86df1f..1cc5f100 100755
--- a/doc/source/user_guide/ug_running.rst
+++ b/doc/source/user_guide/ug_running.rst
@@ -390,8 +390,12 @@ On macOS:
 
 .. code-block:: bash
 
-  # Download the Miniconda installer to ~/Downloads/miniconda.sh
+  # Check hardware platform (x86_64 or arm64)
+  uname -m
+  # Download the compatible Miniconda installer to ~/Downloads/miniconda.sh
   curl -L https://repo.anaconda.com/miniconda/Miniconda3-latest-MacOSX-x86_64.sh -o ~/Downloads/miniconda.sh
+  # or
+  curl -L https://repo.anaconda.com/miniconda/Miniconda3-latest-MacOSX-arm64.sh -o ~/Downloads/miniconda.sh
   # Install Miniconda
   bash ~/Downloads/miniconda.sh