diff --git a/browser/config/mozconfigs/macosx64-aarch64/cross-noopt-debug b/browser/config/mozconfigs/macosx64-aarch64/cross-noopt-debug
index 6950008f9327..5a95a8e6c3e5 100644
--- a/browser/config/mozconfigs/macosx64-aarch64/cross-noopt-debug
+++ b/browser/config/mozconfigs/macosx64-aarch64/cross-noopt-debug
@@ -9,6 +9,3 @@ ac_add_options --target=aarch64-apple-darwin
 # It may conflict with settings from mozconfig.override, but that seems
 # unlikely.
 ac_add_options --disable-optimize
-
-# TODO: Remove in bug 1773743
-export MACOS_SDK_DIR=$MOZ_FETCHES_DIR/MacOSX11.3.sdk
diff --git a/browser/config/mozconfigs/macosx64/cross-noopt-debug b/browser/config/mozconfigs/macosx64/cross-noopt-debug
index f2d8090b2d88..87461dfd2eb3 100644
--- a/browser/config/mozconfigs/macosx64/cross-noopt-debug
+++ b/browser/config/mozconfigs/macosx64/cross-noopt-debug
@@ -7,6 +7,3 @@ MOZ_AUTOMATION_BUILD_SYMBOLS=0
 # It may conflict with settings from mozconfig.override, but that seems
 # unlikely.
 ac_add_options --disable-optimize
-
-# TODO: Remove in bug 1773743
-export MACOS_SDK_DIR=$MOZ_FETCHES_DIR/MacOSX11.3.sdk
diff --git a/browser/config/mozconfigs/macosx64/plain-opt b/browser/config/mozconfigs/macosx64/plain-opt
index 8ec850f2aca9..b5c1e469c5df 100644
--- a/browser/config/mozconfigs/macosx64/plain-opt
+++ b/browser/config/mozconfigs/macosx64/plain-opt
@@ -1,2 +1 @@
 ac_add_options --disable-release
-export MACOS_SDK_DIR=$MOZ_FETCHES_DIR/MacOSX13.0.sdk
diff --git a/build/macosx/mozconfig.common b/build/macosx/mozconfig.common
index 633788d3e16b..d92816b00c90 100644
--- a/build/macosx/mozconfig.common
+++ b/build/macosx/mozconfig.common
@@ -2,8 +2,6 @@ if test `uname -s` = Linux; then
   . $topsrcdir/build/macosx/cross-mozconfig.common
 fi
 
-export MACOS_SDK_DIR=$MOZ_FETCHES_DIR/MacOSX13.0.sdk
-
 if [ -n "$TASKCLUSTER_PGO_PROFILE_USE" -a -z "$USE_ARTIFACT" ]; then
     # Work around https://github.com/llvm/llvm-project/issues/57734
     export LDFLAGS=-Wl,-mllvm,--opaque-pointers
diff --git a/build/moz.configure/toolchain.configure b/build/moz.configure/toolchain.configure
index cd073706a25b..7541634d11d7 100644
--- a/build/moz.configure/toolchain.configure
+++ b/build/moz.configure/toolchain.configure
@@ -96,7 +96,7 @@ with only_when(host_is_osx | target_is_osx):
         return Version(obj["Version"])
 
     def sdk_min_version():
-        return "11.3"
+        return "13.0"
 
     @depends(
         "--with-macos-sdk",
diff --git a/python/mozbuild/mozbuild/test/configure/macos_fake_sdk/SDKSettings.plist b/python/mozbuild/mozbuild/test/configure/macos_fake_sdk/SDKSettings.plist
index 068f928f3495..9bd13e7e8388 100644
--- a/python/mozbuild/mozbuild/test/configure/macos_fake_sdk/SDKSettings.plist
+++ b/python/mozbuild/mozbuild/test/configure/macos_fake_sdk/SDKSettings.plist
@@ -3,6 +3,6 @@
 <plist version="1.0">
 <dict>
         <key>Version</key>
-        <string>11.3</string>
+        <string>13.0</string>
 </dict>
 </plist>
diff --git a/taskcluster/ci/build/macosx.yml b/taskcluster/ci/build/macosx.yml
index e79685d21041..facfaea4c07b 100644
--- a/taskcluster/ci/build/macosx.yml
+++ b/taskcluster/ci/build/macosx.yml
@@ -493,7 +493,7 @@ macosx64-noopt/debug:
             - linux64-cctools-port
             - linux64-clang
             - linux64-sccache
-            - macosx64-sdk-11.3
+            - macosx64-sdk
             - sysroot-wasm32-wasi
 
 macosx64-aarch64-noopt/debug:
@@ -524,7 +524,7 @@ macosx64-aarch64-noopt/debug:
             - linux64-cctools-port
             - linux64-clang
             - linux64-sccache
-            - macosx64-sdk-11.3
+            - macosx64-sdk
             - sysroot-wasm32-wasi
 
 macosx64-add-on-devel/opt:
diff --git a/taskcluster/ci/toolchain/macos-sdk.yml b/taskcluster/ci/toolchain/macos-sdk.yml
index b18c61d210e3..a446e90c26de 100644
--- a/taskcluster/ci/toolchain/macos-sdk.yml
+++ b/taskcluster/ci/toolchain/macos-sdk.yml
@@ -33,26 +33,6 @@ macosx64-sdk-11.0:
             - /Applications/Xcode-12.2.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX11.0.sdk
         toolchain-artifact: project/gecko/mac-sdk/MacOSX11.0.sdk.tar.zst
 
-macosx64-sdk-11.3:
-    description: "MacOSX11.3 SDK"
-    attributes:
-        local-toolchain: true
-    treeherder:
-        symbol: TM(sdk11.3)
-    worker-type: b-linux-gcp
-    run:
-        script: unpack-sdk.py
-        arguments:
-            - https://swcdn.apple.com/content/downloads/52/17/002-41708-A_E8MFK7B2PK/6p55tbmh0qttgbt4cy94uuvnacy6tkw435/CLTools_macOSLMOS_SDK.pkg
-            - b075d3d2f3b066607209a5bbf7cf727a40b98fe65629c5b6abc17f156897af4a
-            - Library/Developer/CommandLineTools/SDKs/MacOSX11.3.sdk
-        toolchain-artifact: project/gecko/mac-sdk/MacOSX11.3.sdk.tar.zst
-        toolchain-alias:
-            - MacOSX11.3.sdk
-        resources:
-            - python/mozbuild/mozpack/macpkg.py
-            - taskcluster/scripts/misc/unpack-sdk.py
-
 macosx64-sdk-13.0:
     description: "MacOSX13.0 SDK"
     attributes: