diff --git a/build/config/compiler/BUILD.gn b/build/config/compiler/BUILD.gn
index fa72f02e71..ba20010d7b 100644
--- a/build/config/compiler/BUILD.gn
+++ b/build/config/compiler/BUILD.gn
@@ -176,11 +176,6 @@ config("compiler") {
         "-arch",
         "arm64",
       ]
-      if (is_mac) {
-        # Aligned allocations are only supported on arm64 after macOS 10.14,
-        # however our deployment target is currently 10.11.
-        common_mac_flags += [ "-fno-aligned-allocation" ]
-      }
     }
 
     cflags += common_mac_flags
diff --git a/build/config/mac/mac_sdk.gni b/build/config/mac/mac_sdk.gni
index d28d28f32b..c9ffa59229 100644
--- a/build/config/mac/mac_sdk.gni
+++ b/build/config/mac/mac_sdk.gni
@@ -6,11 +6,11 @@ import("//build/toolchain/goma.gni")
 
 declare_args() {
   # Minimum supported version of the Mac SDK.
-  mac_sdk_min = "10.13"
+  mac_sdk_min = "10.14"
 
   # The MACOSX_DEPLOYMENT_TARGET variable used when compiling.
   # Must be of the form x.x.x for Info.plist files.
-  mac_deployment_target = "10.13.0"
+  mac_deployment_target = "10.14.0"
 
   # Path to a specific version of the Mac SDK, not including a backslash at
   # the end. If empty, the path to the lowest version greater than or equal to