diff --git a/src/musredit_qt5/musredit/CMakeLists.txt b/src/musredit_qt5/musredit/CMakeLists.txt
index bcb0b2b2..a3d4d920 100644
--- a/src/musredit_qt5/musredit/CMakeLists.txt
+++ b/src/musredit_qt5/musredit/CMakeLists.txt
@@ -88,8 +88,14 @@ set_property(SOURCE ui_PMsr2DataDialog.h PROPERTY SKIP_AUTOMOC ON)
 set_property(SOURCE ui_PChangeDefaultPathsDialog.h PROPERTY SKIP_AUTOMOC ON)
 set_property(SOURCE qrc_musredit.cpp PROPERTY SKIP_AUTOMOC ON)
 
-set(macosx_icon icons/musredit.icns)
 if (APPLE)
+  if (${CMAKE_HOST_SYSTEM_VERSION} GREATER_EQUAL "20.3.0")
+    set(macosx_icon_name musredit-bigsur.icns)
+  else()	
+    set(macosx_icon_name musredit.icns)
+  endif()
+  set(macosx_icon "icons/${macosx_icon_name}")
+message(STATUS "macosx_icon: ${macosx_icon}")
   add_executable(musredit MACOSX_BUNDLE
     ${musredit_src}
     ${out_ui}
@@ -144,7 +150,7 @@ if (APPLE)
     MACOSX_BUNDLE TRUE
     MACOSX_BUNDLE_BUNDLE_NAME "musredit"
     MACOSX_BUNDLE_INFO_STRING "musrfit: musredit simplifies the handling of the msr-files for uSR fitting."
-    MACOSX_BUNDLE_ICON_FILE "musredit.icns"
+    MACOSX_BUNDLE_ICON_FILE "${macosx_icon_name}"
     MACOSX_BUNDLE_LONG_VERSION_STRING "${PROJECT_VERSION}"
     MACOSX_BUNDLE_GUI_IDENTIFIER "ch.psi.lmu.musredit"
     MACOSX_BUNDLE_COPYRIGHT "Andreas Suter"
diff --git a/src/musredit_qt5/musredit/icons/musredit-bigsur.icns b/src/musredit_qt5/musredit/icons/musredit-bigsur.icns
new file mode 100644
index 00000000..7de4b246
Binary files /dev/null and b/src/musredit_qt5/musredit/icons/musredit-bigsur.icns differ
diff --git a/src/musredit_qt6/musredit/CMakeLists.txt b/src/musredit_qt6/musredit/CMakeLists.txt
index e3986681..eae972a7 100644
--- a/src/musredit_qt6/musredit/CMakeLists.txt
+++ b/src/musredit_qt6/musredit/CMakeLists.txt
@@ -84,8 +84,13 @@ set_property(SOURCE ui_PMsr2DataDialog.h PROPERTY SKIP_AUTOMOC ON)
 set_property(SOURCE ui_PChangeDefaultPathsDialog.h PROPERTY SKIP_AUTOMOC ON)
 set_property(SOURCE qrc_musredit.cpp PROPERTY SKIP_AUTOMOC ON)
 
-set(macosx_icon icons/musredit.icns)
 if (APPLE)
+  if (${CMAKE_HOST_SYSTEM_VERSION} GREATER_EQUAL "20.3.0")
+    set(macosx_icon_name musredit-bigsur.icns)
+  else()
+    set(macosx_icon_name musredit.icns)
+  endif()
+  set(macosx_icon "icons/${macosx_icon_name}")      	
   add_executable(musredit MACOSX_BUNDLE
     ${musredit_src}
     ${out_ui}
@@ -117,7 +122,7 @@ if (APPLE)
     MACOSX_BUNDLE TRUE
     MACOSX_BUNDLE_BUNDLE_NAME "musredit"
     MACOSX_BUNDLE_INFO_STRING "musrfit: musredit simplifies the handling of the msr-files for uSR fitting."
-    MACOSX_BUNDLE_ICON_FILE "musredit.icns"
+    MACOSX_BUNDLE_ICON_FILE "${macosx_icon_name}"
     MACOSX_BUNDLE_LONG_VERSION_STRING "${PROJECT_VERSION}"
     MACOSX_BUNDLE_GUI_IDENTIFIER "ch.psi.lmu.musredit"
     MACOSX_BUNDLE_COPYRIGHT "Andreas Suter"
diff --git a/src/musredit_qt6/musredit/icons/musredit-bigsur.icns b/src/musredit_qt6/musredit/icons/musredit-bigsur.icns
new file mode 100644
index 00000000..7de4b246
Binary files /dev/null and b/src/musredit_qt6/musredit/icons/musredit-bigsur.icns differ