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Update formatting on BUILD_OSX.md.

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BUILD_OSX.md
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@ -1,6 +1,6 @@
# Build MacOS
# Build macOS
*Last Updated on October 19, 2021*
*Last Updated on December 1, 2021*
Please read the [general build guide](BUILD.md) for information on dependencies required for all platforms. This will include the necessary environment variables to customize your build. Only macOS specific instructions are found in this document.
@ -21,9 +21,9 @@ brew install cmake openssl npm
Download an install Python 3.6.6 or higher from [here](https://www.python.org/downloads/).
Execute the `Update Shell Profile.command` script that is provided with the installer.
### MacOS SDK
### macOS SDK
You will need version `10.12` of the macOS SDK for building, otherwise you may have crashing or other unintended issues due to the deprecation of OpenGL on macOS. You can get that SDK from [here](https://github.com/phracker/MacOSX-SDKs). You must copy it in to your Xcode SDK directory, e.g.
You will need version `10.12` of the macOS SDK for building, otherwise you may experience crashing or other unintended issues due to the deprecation of OpenGL on macOS. You can get that SDK from [here](https://github.com/phracker/MacOSX-SDKs). You must copy it in to your Xcode SDK directory, e.g.
```bash
cp -rp ~/Downloads/MacOSX10.12.sdk /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/
@ -64,14 +64,17 @@ You can append `-j4` to assign more threads to build with. The number indicates
To package the installation, you can simply run `make package` afterwards.
## Notes
## Architecture Support
If build is intended for packaging or creation of AppImage, `VIRCADIA_CPU_ARCHITECTURE`
CMake variable needs to be set to architecture specific value.
It defaults to `-march=native -mtune=native`, which yields builds optimized for particular
machine, but builds will not work on machines lacking same CPU instructions.
For packaging and AppImage it is recommended to set it to different value, for example `-msse3`.
Setting `VIRCADIA_CPU_ARCHITECTURE` to empty string will use default compiler settings and yield
If the build is intended to be packaged for distribution, the `VIRCADIA_CPU_ARCHITECTURE`
CMake variable needs to be set to an architecture specific value.
By default, it is set to `-march=native -mtune=native`, which yields builds optimized for a particular
machine, but these builds will not work on machines lacking same CPU instructions.
For packaging, it is recommended to set it to a different value, for example `-msse3`. This will help ensure that the build will run on all reasonably modern CPUs.
Setting `VIRCADIA_CPU_ARCHITECTURE` to an empty string will use the default compiler settings and yield
maximum compatibility.
## FAQ