rm macOS for now

README.md

@@ -1,3 +1,7 @@
+
+
+
+
 # Witness Server for XRPL Sidechains
 
 This is the Witness Server for [XLS-38d Cross-Chain bridge project](https://github.com/XRPLF/XRPL-Standards/tree/master/XLS-0038d-cross-chain-bridge). "Witness Servers" validate transfers between "door accounts" that connect a locking chain to each issuing chain by listening for transactions on one or both of the chains and signing attestations to prove certain events happened on a chain.
@@ -19,7 +23,7 @@ This is the Witness Server for [XLS-38d Cross-Chain bridge project](https://gith
 |-------------|---------|
 | GCC         | 11      |
 | Clang       | 13      |
-| Apple Clang | 14.0.3  |
+| Apple clang | 15      |
 
 ## Build and run
 
@@ -29,58 +33,99 @@ This is the Witness Server for [XLS-38d Cross-Chain bridge project](https://gith
 mkdir .build && cd .build
 ```
 
-2) Configure Conan (once before first build)
+2. Configure Conan.
 
 Add Ripple's Artifactory as a Conan remote to source the `libxrpl` Conan package.
 
 ```bash
-  conan remote add --insert 0 conan-non-prod http://18.143.149.228:8081/artifactory/api/conan/conan-non-prod
+conan remote add --insert 0 conan-non-prod http://18.143.149.228:8081/artifactory/api/conan/conan-non-prod
+
 ```
+<details>
+<summary> Optional local development of <code>xrpl</code> library</summary>
 
-3. Configure the Conan profile.
+The Conan `xrpl` recipe is also available by checking out the [`rippled` source](https://github.com/XRPLF/rippled.git) and exporting the recipe locally.
 
 ```bash
+git clone https://github.com/XRPLF/rippled.git
+cd rippled 
+conan export .
+```
+</details>
 
+```bash
 conan profile update settings.cppstd=20 default
 conan profile update settings.compiler.libcxx=libstdc++11 default
 ```
-Your profile should look like:
+<br>
+<details>
+      <summary>Example Conan profiles</summary>
+
+### Linux
+```ini
+  [settings]
+  arch=x86_64
+  arch_build=x86_64
+  os=Linux
+  os_build=Linux
+  build_type=Release
+  compiler=gcc
+  compiler.cppstd=20
+  compiler.libcxx=libstdc++11
+  compiler.version=11
+```
+### macOS
+
+On macOS [you may get an error from Boost](https://github.com/XRPLF/rippled/blob/develop/BUILD.md#call-to-async_teardown-is-ambiguous) 
+which requires adding some CMake flags to your Conan profile.
 ```
+conan profile update 'env.CXXFLAGS="-DBOOST_ASIO_DISABLE_CONCEPTS"' default
+conan profile update 'conf.tools.build:cxxflags+=["-DBOOST_ASIO_DISABLE_CONCEPTS"]' default
+```
+
+```ini
 [settings]
-arch=x86_64
-arch_build=x86_64
-os=Linux
-os_build=Linux
+os=Macos
+os_build=Macos
+arch=armv8
+arch_build=armv8
+compiler=apple-clang
+compiler.version=15
 build_type=Release
-compiler=gcc
 compiler.cppstd=20
-compiler.libcxx=libstdc++11
-compiler.version=11
+compiler.libcxx=libc++
+[options]
+[conf]
+tools.build:cxxflags=['-DBOOST_ASIO_DISABLE_CONCEPTS']
+[build_requires]
+[env]
+CXXFLAGS=-DBOOST_ASIO_DISABLE_CONCEPTS
 ```
+</details>
 
-4. Run Conan to install and/or build dependencies.
+3. Run Conan to install and/or build dependencies.
 
 ``` bash
 conan install .. \
   --output-folder . \
   --build missing \
   --settings build_type=Release
 ```
-5. Configure CMake.
+4. Configure CMake.
 
 ``` bash
 cmake .. \
   -DCMAKE_BUILD_TYPE=Release \
   -DCMAKE_TOOLCHAIN_FILE=conan_toolchain.cmake
 ```
 
-6) Build with CMake.
+5. Build with CMake.
 
 ``` bash
 cmake --build --parallel $(nproc)
 ```
 
-7) Run the unit tests.
+6. Run the unit tests.
 
 ``` bash
 ./xbridge_witnessd --unittest