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+
+# Building Slic3r PE on Mac OS
+
+To build Slic3r PE on Mac OS, you will need to install XCode, [CMake](https://cmake.org/) (available on Brew) and possibly git.
+
+### Dependencies
+
+Slic3r comes with a set of CMake scripts to build its dependencies, it lives in the `deps` directory.
+Open a terminal window and navigate to Slic3r sources directory and then to `deps`.
+Use the following commands to build the dependencies:
+
+    mkdir build
+    cd build
+    cmake ..
+    make
+
+This will create a dependencies bundle inside the `build/destdir` directory.
+You can also customize the bundle output path using the `-DDESTDIR=<some path>` option passed to `cmake`.
+
+**Warning**: Once the dependency bundle is installed in a destdir, the destdir cannot be moved elsewhere.
+(This is because wxWidgets hardcode the installation path.)
+
+
+### Building Slic3r
+
+If dependencies built without an error, you can proceed to build Slic3r itself.
+Go back to top level Slic3r sources directory and use these commands:
+
+    mkdir build
+    cd build
+    cmake .. -DCMAKE_PREFIX_PATH="$PWD/../deps/build/destdir/usr/local"
+
+The `CMAKE_PREFIX_PATH` is the path to the dependencies bundle but with `/usr/local` appended - if you set a custom path
+using the `DESTDIR` option, you will need to change this accordingly. **Warning:** the `CMAKE_PREFIX_PATH` needs to be an absolute path.
+
+The CMake command above prepares Slic3r for building from the command line.
+To start the build, use
+
+    make -jN
+
+where `N` is the number of CPU cores, so, for example `make -j4` for a 4-core machine.
+
+Alternatively, if you would like to use XCode GUI, modify the `cmake` command to include the `-GXcode` option:
+
+    cmake .. -GXcode -DCMAKE_PREFIX_PATH="$PWD/../deps/build/destdir/usr/local"
+
+and then open the `Slic3r.xcodeproj` file.
+This should open up XCode where you can perform build using the GUI or perform other tasks.
+
+### Note on Mac OS X SDKs
+
+By default Slic3r builds against whichever SDK is the default on the current system.
+
+This can be customized. The `CMAKE_OSX_SYSROOT` option sets the path to the SDK directory location
+and the `CMAKE_OSX_DEPLOYMENT_TARGET` option sets the target OS X system version (eg. `10.14` or similar).
+Note you can set just one value and the other will be guessed automatically.
+In case you set both, the two settings need to agree with each other. (Building with a lower deployment target
+is currently unsupported because some of the dependencies don't support this, most notably wxWidgets.)
+
+Please note that the `CMAKE_OSX_DEPLOYMENT_TARGET` and `CMAKE_OSX_SYSROOT` options need to be set the same
+on both the dependencies bundle as well as Slic3r PE itself.
+
+Official Mac Slic3r builds are currently built against SDK 10.9 to ensure compatibility with older Macs.