diff --git a/cd/00_setup_env_mac.sh b/cd/00_setup_env_mac.sh
index 68b002b0e4..5d1b265007 100755
--- a/cd/00_setup_env_mac.sh
+++ b/cd/00_setup_env_mac.sh
@@ -10,6 +10,6 @@ export CONTAINER_NAME=ci_macos_cross
 export DOCKER_NAME_TAG=ubuntu:20.04
 export HOST=x86_64-apple-darwin
 export PACKAGES="cmake imagemagick libcap-dev librsvg2-bin libz-dev libbz2-dev libtiff-tools libtinfo5 python3-dev python3-setuptools xorriso"
-export XCODE_VERSION=12.1
-export XCODE_BUILD_ID=12A7403
+export XCODE_VERSION=15.0
+export XCODE_BUILD_ID=15A240d
 export GRIDCOIN_CONFIG="--with-gui --enable-reduce-exports"
diff --git a/ci/test/00_setup_env_mac.sh b/ci/test/00_setup_env_mac.sh
index 237077efd1..d1c3558ba6 100755
--- a/ci/test/00_setup_env_mac.sh
+++ b/ci/test/00_setup_env_mac.sh
@@ -10,8 +10,8 @@ export CONTAINER_NAME=ci_macos_cross
 export DOCKER_NAME_TAG=ubuntu:20.04  # Check that Focal can cross-compile to macos
 export HOST=x86_64-apple-darwin
 export PACKAGES="cmake imagemagick libcap-dev librsvg2-bin libz-dev libbz2-dev libtiff-tools libtinfo5 python3-dev python3-setuptools xorriso"
-export XCODE_VERSION=12.1
-export XCODE_BUILD_ID=12A7403
+export XCODE_VERSION=15.0
+export XCODE_BUILD_ID=15A240d
 export RUN_UNIT_TESTS=false
 export RUN_FUNCTIONAL_TESTS=false
 export GOAL="deploy"
diff --git a/contrib/macdeploy/README.md b/contrib/macdeploy/README.md
index 602b120e56..b66e62a5d1 100644
--- a/contrib/macdeploy/README.md
+++ b/contrib/macdeploy/README.md
@@ -12,44 +12,42 @@ When complete, it will have produced `Gridcoin.dmg`.
 
 ### Step 1: Obtaining `Xcode.app`
 
-Our current macOS SDK
-(`Xcode-12.1-12A7403-extracted-SDK-with-libcxx-headers.tar.gz`) can be
-extracted from
-[Xcode_12.1.xip](https://download.developer.apple.com/Developer_Tools/Xcode_12.1/Xcode_12.1.xip).
+Our current macOS SDK can be extracted from
+[Xcode_15.xip](https://download.developer.apple.com/Developer_Tools/Xcode_15/Xcode_15.xip).
 An Apple ID is needed to download this.
 
-After Xcode version 7.x, Apple started shipping the `Xcode.app` in a `.xip`
-archive. This makes the SDK less-trivial to extract on non-macOS machines. One
-approach (tested on Debian Buster) is outlined below:
+The `sha256sum` of the downloaded XIP archive should be `4daaed2ef2253c9661779fa40bfff50655dc7ec45801aba5a39653e7bcdde48e`.
+
+To extract the `.xip` on Linux:
 
 ```bash
 # Install/clone tools needed for extracting Xcode.app
 apt install cpio
 git clone https://github.com/bitcoin-core/apple-sdk-tools.git
 
-# Unpack Xcode_12.1.xip and place the resulting Xcode.app in your current
+# Unpack the xip and place the resulting Xcode.app in your current
 # working directory
-python3 apple-sdk-tools/extract_xcode.py -f Xcode_12.1.xip | cpio -d -i
+python3 apple-sdk-tools/extract_xcode.py -f Xcode_15.xip | cpio -d -i
 ```
 
-On macOS the process is more straightforward:
+On macOS:
 
 ```bash
-xip -x Xcode_12.1.xip
+xip -x Xcode_15.xip
 ```
 
-### Step 2: Generating `Xcode-12.1-12A7403-extracted-SDK-with-libcxx-headers.tar.gz` from `Xcode.app`
+### Step 2: Generating the SDK tarball from `Xcode.app`
 
-To generate `Xcode-12.1-12A7403-extracted-SDK-with-libcxx-headers.tar.gz`, run
-the script [`gen-sdk`](./gen-sdk) with the path to `Xcode.app` (extracted in the
-previous stage) as the first argument.
+To generate the SDK, run the script [`gen-sdk`](./gen-sdk) with the
+path to `Xcode.app` (extracted in the previous stage) as the first argument.
 
 ```bash
-# Generate a Xcode-12.1-12A7403-extracted-SDK-with-libcxx-headers.tar.gz from
-# the supplied Xcode.app
 ./contrib/macdeploy/gen-sdk '/path/to/Xcode.app'
 ```
 
+The generated archive should be: `Xcode-15.0-15A240d-extracted-SDK-with-libcxx-headers.tar.gz`.
+The `sha256sum` should be `c0c2e7bb92c1fee0c4e9f3a485e4530786732d6c6dd9e9f418c282aa6892f55d`.
+
 ## Cross Platform Building
 
 Download and extract the SDK to depends/SDKs. Then build the dependencies from
@@ -95,17 +93,7 @@ This version of `cctools` has been patched to use the current version of `clang`
 and its `libLTO.so` rather than those from `llvmgcc`, as it was originally done in `toolchain4`.
 
 To complicate things further, all builds must target an Apple SDK. These SDKs are free to
-download, but not redistributable. To obtain it, register for an Apple Developer Account,
-then download [Xcode_12.1.xip](https://download.developer.apple.com/Developer_Tools/Xcode_12.1/Xcode_12.1.xip).
-
-This file is many gigabytes in size, but most (but not all) of what we need is
-contained only in a single directory:
-
-```bash
-Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk
-```
-
-See the SDK Extraction notes above for how to obtain it.
+download, but not redistributable. See the SDK Extraction notes above for how to obtain it.
 
 The Gitian descriptors build 2 sets of files: Linux tools, then Apple binaries which are
 created using these tools. The build process has been designed to avoid including the
diff --git a/contrib/macdeploy/gen-sdk b/contrib/macdeploy/gen-sdk
index 457d8f5e64..e69b532340 100755
--- a/contrib/macdeploy/gen-sdk
+++ b/contrib/macdeploy/gen-sdk
@@ -47,9 +47,6 @@ def run():
 
     out_name = "Xcode-{xcode_version}-{xcode_build_id}-extracted-SDK-with-libcxx-headers".format(xcode_version=xcode_version, xcode_build_id=xcode_build_id)
 
-    xcode_libcxx_dir = xcode_app.joinpath("Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1")
-    assert xcode_libcxx_dir.is_dir()
-
     if args.out_sdktgz:
         out_sdktgz_path = pathlib.Path(args.out_sdktgz_path)
     else:
@@ -57,7 +54,7 @@ def run():
         out_sdktgz_path = pathlib.Path("./{}.tar.gz".format(out_name))
 
     def tarfp_add_with_base_change(tarfp, dir_to_add, alt_base_dir):
-        """Add all files in dir_to_add to tarfp, but prepent MEMBERPREFIX to the files'
+        """Add all files in dir_to_add to tarfp, but prepent alt_base_dir to the files'
         names
 
         e.g. if the only file under /root/bazdir is /root/bazdir/qux, invoking:
@@ -85,8 +82,6 @@ def run():
             with tarfile.open(mode="w", fileobj=gzf) as tarfp:
                 print("Adding MacOSX SDK {} files...".format(sdk_version))
                 tarfp_add_with_base_change(tarfp, sdk_dir, out_name)
-                print("Adding libc++ headers...")
-                tarfp_add_with_base_change(tarfp, xcode_libcxx_dir, "{}/usr/include/c++/v1".format(out_name))
     print("Done! Find the resulting gzipped tarball at:")
     print(out_sdktgz_path.resolve())
 
diff --git a/depends/hosts/darwin.mk b/depends/hosts/darwin.mk
index 952a0e8181..9d3f43e9f5 100644
--- a/depends/hosts/darwin.mk
+++ b/depends/hosts/darwin.mk
@@ -1,8 +1,8 @@
 OSX_MIN_VERSION=10.14
-OSX_SDK_VERSION=10.15.6
-XCODE_VERSION=12.1
-XCODE_BUILD_ID=12A7403
-LLD_VERSION=609
+OSX_SDK_VERSION=14.0
+XCODE_VERSION=15.0
+XCODE_BUILD_ID=15A240d
+LLD_VERSION=711
 
 OSX_SDK=$(SDK_PATH)/Xcode-$(XCODE_VERSION)-$(XCODE_BUILD_ID)-extracted-SDK-with-libcxx-headers