diff --git a/build/macosx/cross-mozconfig.common b/build/macosx/cross-mozconfig.common
index 40a62262abb1..0fc1b038f4d3 100644
--- a/build/macosx/cross-mozconfig.common
+++ b/build/macosx/cross-mozconfig.common
@@ -10,7 +10,7 @@ mk_add_options "export PATH=$MOZ_FETCHES_DIR/cctools/bin:$MOZ_FETCHES_DIR/binuti
 # dsymutil needs a libstdc++ more recent than what's on the system.
 mk_add_options "export LD_LIBRARY_PATH=$MOZ_FETCHES_DIR/clang/lib"
 
-CROSS_SYSROOT=$MOZ_FETCHES_DIR/MacOSX10.12.sdk
+CROSS_SYSROOT=$MOZ_FETCHES_DIR/MacOSX11.0.sdk
 
 export CFLAGS="$CFLAGS -fcrash-diagnostics-dir=${UPLOAD_PATH}"
 export CXXFLAGS="$CXXFLAGS -fcrash-diagnostics-dir=${UPLOAD_PATH}"
diff --git a/taskcluster/ci/build/macosx.yml b/taskcluster/ci/build/macosx.yml
index 486a16b78138..adac675eb229 100644
--- a/taskcluster/ci/build/macosx.yml
+++ b/taskcluster/ci/build/macosx.yml
@@ -53,7 +53,7 @@ macosx64/debug:
             - linux64-cctools-port
             - linux64-clang
             - linux64-sccache
-            - macosx64-sdk-10.12
+            - macosx64-sdk-11.0
             - sysroot-wasm32-wasi
 
 macosx64-hybrid/plain:
@@ -82,7 +82,7 @@ macosx64-hybrid/plain:
             - linux64-cctools-port
             - linux64-clang
             - linux64-sccache
-            - macosx64-sdk-10.12
+            - macosx64-sdk-11.0
             - sysroot-wasm32-wasi
 
 macosx64/opt:
@@ -111,7 +111,7 @@ macosx64/opt:
             - linux64-cctools-port
             - linux64-clang
             - linux64-sccache
-            - macosx64-sdk-10.12
+            - macosx64-sdk-11.0
             - sysroot-wasm32-wasi
 
 macosx64-asan-fuzzing/opt:
@@ -142,7 +142,7 @@ macosx64-asan-fuzzing/opt:
             - linux64-clang
             - linux64-sccache
             - macosx64-llvm-symbolizer
-            - macosx64-sdk-10.12
+            - macosx64-sdk-11.0
             - sysroot-wasm32-wasi
     optimization:
         skip-unless-expanded: null
@@ -175,7 +175,7 @@ macosx64-fuzzing/debug:
             - linux64-cctools-port
             - linux64-clang
             - linux64-sccache
-            - macosx64-sdk-10.12
+            - macosx64-sdk-11.0
             - sysroot-wasm32-wasi
     optimization:
         skip-unless-expanded: null
@@ -215,7 +215,7 @@ macosx64-x64-devedition/opt:
         toolchain:
             - linux64-cctools-port
             - linux64-clang
-            - macosx64-sdk-10.12
+            - macosx64-sdk-11.0
             - sysroot-wasm32-wasi
 
 macosx64-aarch64-devedition/opt:
@@ -422,7 +422,7 @@ macosx64-noopt/debug:
             - linux64-cctools-port
             - linux64-clang
             - linux64-sccache
-            - macosx64-sdk-10.12
+            - macosx64-sdk-11.0
             - sysroot-wasm32-wasi
 
 macosx64-aarch64-noopt/debug:
@@ -479,7 +479,7 @@ macosx64-add-on-devel/opt:
             - linux64-cctools-port
             - linux64-clang
             - linux64-sccache
-            - macosx64-sdk-10.12
+            - macosx64-sdk-11.0
             - sysroot-wasm32-wasi
 
 macosx64-x64-shippable/opt:
@@ -513,7 +513,7 @@ macosx64-x64-shippable/opt:
         toolchain:
             - linux64-cctools-port
             - linux64-clang
-            - macosx64-sdk-10.12
+            - macosx64-sdk-11.0
             - sysroot-wasm32-wasi
 
 macosx64-aarch64-shippable/opt:
@@ -718,5 +718,5 @@ macosx64-ccov/opt:
             - linux64-cctools-port
             - linux64-clang
             - linux64-sccache
-            - macosx64-sdk-10.12
+            - macosx64-sdk-11.0
             - sysroot-wasm32-wasi
diff --git a/taskcluster/ci/instrumented-build/kind.yml b/taskcluster/ci/instrumented-build/kind.yml
index 957008c6e264..430d94741b45 100644
--- a/taskcluster/ci/instrumented-build/kind.yml
+++ b/taskcluster/ci/instrumented-build/kind.yml
@@ -132,7 +132,7 @@ jobs:
                 - linux64-dump_syms
                 - linux64-nasm
                 - linux64-node
-                - macosx64-sdk-10.12
+                - macosx64-sdk-11.0
                 - sysroot-x86_64-linux-gnu
                 - sysroot-wasm32-wasi
 
diff --git a/taskcluster/ci/searchfox/kind.yml b/taskcluster/ci/searchfox/kind.yml
index 81f156be8c87..e2c38129d7c0 100644
--- a/taskcluster/ci/searchfox/kind.yml
+++ b/taskcluster/ci/searchfox/kind.yml
@@ -96,7 +96,7 @@ jobs:
                 - linux64-rust-macos
                 - linux64-cbindgen
                 - linux64-dump_syms
-                - macosx64-sdk-10.12
+                - macosx64-sdk-11.0
                 - sysroot-x86_64-linux-gnu
                 - sysroot-wasm32-wasi
 
diff --git a/taskcluster/ci/toolchain/macos-sdk.yml b/taskcluster/ci/toolchain/macos-sdk.yml
index 3f39d7df15a2..6675cea995e6 100644
--- a/taskcluster/ci/toolchain/macos-sdk.yml
+++ b/taskcluster/ci/toolchain/macos-sdk.yml
@@ -24,15 +24,6 @@ macosx64-sdk-10.11:
             - /Applications/Xcode-7.3.1.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk
         toolchain-artifact: project/gecko/mac-sdk/MacOSX10.11.sdk.tar.zst
 
-macosx64-sdk-10.12:
-    description: "MacOSX10.12 SDK"
-    treeherder:
-        symbol: TM(sdk10.12)
-    run:
-        arguments:
-            - /Applications/Xcode-8.3.3.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk
-        toolchain-artifact: project/gecko/mac-sdk/MacOSX10.12.sdk.tar.zst
-
 macosx64-sdk-11.0:
     description: "MacOSX11.0 SDK"
     treeherder:
diff --git a/taskcluster/ci/webrender/kind.yml b/taskcluster/ci/webrender/kind.yml
index 3bb3ea7573f3..b9b5bda10ab4 100644
--- a/taskcluster/ci/webrender/kind.yml
+++ b/taskcluster/ci/webrender/kind.yml
@@ -113,7 +113,7 @@ jobs:
                 - linux64-rust-macos
                 - linux64-cctools-port
                 - linux64-clang-14
-                - macosx64-sdk-10.12
+                - macosx64-sdk-11.0
                 - wrench-deps
             macosx64-clang-14:
                 - artifact: clang.tar.zst
@@ -173,7 +173,7 @@ jobs:
                 - linux64-rust-macos
                 - linux64-cctools-port
                 - linux64-clang
-                - macosx64-sdk-10.12
+                - macosx64-sdk-11.0
                 - wrench-deps
         run:
             using: run-task
diff --git a/taskcluster/scripts/misc/wr-macos-cross-build-setup.sh b/taskcluster/scripts/misc/wr-macos-cross-build-setup.sh
index 4f7307d810cd..40a7955cc1da 100755
--- a/taskcluster/scripts/misc/wr-macos-cross-build-setup.sh
+++ b/taskcluster/scripts/misc/wr-macos-cross-build-setup.sh
@@ -3,7 +3,7 @@ set -x -e -v
 
 export TARGET_TRIPLE="x86_64-apple-darwin"
 
-MACOS_SYSROOT="${MOZ_FETCHES_DIR}/MacOSX10.12.sdk"
+MACOS_SYSROOT="${MOZ_FETCHES_DIR}/MacOSX11.0.sdk"
 CLANGDIR="${MOZ_FETCHES_DIR}/clang"
 
 # Deploy the wrench dependencies