Make macOS 10.13 the minimum required macOS

Bug: 1322548
Cq-Include-Trybots: luci.chrome.try:mac-chrome
Change-Id: I612e58863a7d8820d8f925c6e38666ab9103b6be
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3646050
Reviewed-by: David Benjamin <davidben@chromium.org>
Reviewed-by: Reilly Grant <reillyg@chromium.org>
Commit-Queue: Avi Drissman <avi@chromium.org>
Reviewed-by: Mark Mentovai <mark@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1003835}
NOKEYCHECK=True
GitOrigin-RevId: 1debcc6090dec3920d40f1668c1427ed8e2b7ddf
diff --git a/mac/mac_sdk.gni b/mac/mac_sdk.gni
index 11bdea2..7b17616 100644
--- a/mac/mac_sdk.gni
+++ b/mac/mac_sdk.gni
@@ -18,7 +18,7 @@
   # `mac_min_system_version` when dropping support for older macOSes but where
   # additional code changes are required to be compliant with the availability
   # rules.
-  mac_deployment_target = "10.11"
+  mac_deployment_target = "10.13"
 
   # The value of the `LSMinimumSystemVersion` in `Info.plist` files. This
   # partially controls the minimum supported version of macOS for Chromium by