diff --git a/Mac/BuildScript/build-installer.py b/Mac/BuildScript/build-installer.py
index 553926852a7ca8..f3728e3259e514 100755
--- a/Mac/BuildScript/build-installer.py
+++ b/Mac/BuildScript/build-installer.py
@@ -264,10 +264,10 @@ def library_recipes():
             tk_patches = ['tk868_on_10_8_10_9.patch']
 
         else:
-            tcl_tk_ver='8.6.12'
-            tcl_checksum='87ea890821d2221f2ab5157bc5eb885f'
+            tcl_tk_ver='8.6.13'
+            tcl_checksum='43a1fae7412f61ff11de2cfd05d28cfc3a73762f354a417c62370a54e2caf066'
 
-            tk_checksum='1d6dcf6120356e3d211e056dff5e462a'
+            tk_checksum='2e65fa069a23365440a3c56c556b8673b5e32a283800d8d9b257e3f584ce0675'
             tk_patches = [ ]
 
 
diff --git a/Misc/NEWS.d/next/macOS/2023-05-21-23-54-52.gh-issue-99834.6ANPts.rst b/Misc/NEWS.d/next/macOS/2023-05-21-23-54-52.gh-issue-99834.6ANPts.rst
new file mode 100644
index 00000000000000..aeb64d25b09add
--- /dev/null
+++ b/Misc/NEWS.d/next/macOS/2023-05-21-23-54-52.gh-issue-99834.6ANPts.rst
@@ -0,0 +1 @@
+Update macOS installer to Tcl/Tk 8.6.13.