Bump minimum Mac OS version to 10.14 (Mojave).

It turns out that the support for C++17 is partial in 10.12, and in particular absl::optional and std::optional are not the same thing under 10.12. Increment to 10.14 which is the lowest version that builds successfully with absl::optional == std::optional.

See: 89cdaed655/absl/base/config.h (L528)
Strictly speaking, we could allow 10.13, but not without updating ABSL in the TF repository to incorporate c86347d4ce which fixes the version detection test to permit 10.13 as well.

.bazelrc

@@ -3,7 +3,7 @@
 
 # Sets the default Apple platform to macOS.
 build --apple_platform_type=macos
-build --macos_minimum_os=10.12
+build --macos_minimum_os=10.14
 
 # Make Bazel print out all options from rc files.
 build --announce_rc

CHANGELOG.md

@@ -35,8 +35,8 @@ PLEASE REMEMBER TO CHANGE THE '..main' WITH AN ACTUAL TAG in GITHUB LINK.
 
 ## jaxlib 0.3.11 (Unreleased)
 * [GitHub commits](https://github.com/google/jax/compare/jaxlib-v0.3.10...main).
-  * x86-64 Mac wheels now require Mac OS 10.12 (Sierra) or newer. Mac OS 10.12
-    was released in 2016, so this should not be an onerous requirement.
+  * x86-64 Mac wheels now require Mac OS 10.14 (Mojave) or newer. Mac OS 10.14
+    was released in 2018, so this should not be a very onerous requirement.
 
 ## jax 0.3.13 (May 16, 2022)
 * [GitHub commits](https://github.com/google/jax/compare/jax-v0.3.12...jax-v0.3.13).

build/build_wheel.py

@@ -278,7 +278,7 @@ def build_wheel(sources_path, output_path, cpu):
     ("Linux", "x86_64"): ("manylinux2014", "x86_64"),
     ("Linux", "aarch64"): ("manylinux2014", "aarch64"),
     ("Linux", "ppc64le"): ("manylinux2014", "ppc64le"),
-    ("Darwin", "x86_64"): ("macosx_10_12", "x86_64"),
+    ("Darwin", "x86_64"): ("macosx_10_14", "x86_64"),
     ("Darwin", "arm64"): ("macosx_11_0", "arm64"),
     ("Windows", "AMD64"): ("win", "amd64"),
   }[(platform.system(), cpu)]