diff --git a/Mac/BuildScript/build-installer.py b/Mac/BuildScript/build-installer.py
index 4145736db654b9..b31cb766a468f4 100755
--- a/Mac/BuildScript/build-installer.py
+++ b/Mac/BuildScript/build-installer.py
@@ -264,10 +264,10 @@ def library_recipes():
             tk_patches = ['backport_gh71383_fix.patch', 'tk868_on_10_8_10_9.patch', 'backport_gh110950_fix.patch']
 
         else:
-            tcl_tk_ver='8.6.15'
-            tcl_checksum='861e159753f2e2fbd6ec1484103715b0be56be3357522b858d3cbb5f893ffef1'
+            tcl_tk_ver='8.6.16'
+            tcl_checksum='91cb8fa61771c63c262efb553059b7c7ad6757afa5857af6265e4b0bdc2a14a5'
 
-            tk_checksum='550969f35379f952b3020f3ab7b9dd5bfd11c1ef7c9b7c6a75f5c49aca793fec'
+            tk_checksum='be9f94d3575d4b3099d84bc3c10de8994df2d7aa405208173c709cc404a7e5fe'
             tk_patches = []
 
 
diff --git a/Misc/NEWS.d/next/macOS/2025-04-06-23-39-47.gh-issue-124111.2JI7iE.rst b/Misc/NEWS.d/next/macOS/2025-04-06-23-39-47.gh-issue-124111.2JI7iE.rst
new file mode 100644
index 00000000000000..550bbe2774179d
--- /dev/null
+++ b/Misc/NEWS.d/next/macOS/2025-04-06-23-39-47.gh-issue-124111.2JI7iE.rst
@@ -0,0 +1 @@
+Update macOS installer to use Tcl/Tk 8.6.16.