1. Find the installed boost folder under
```/usr/local/boost_version```
2. Open Project Settings in Xcode
3. Goto Project settings
4. Find "header search paths"
5. Paste the related folder path. Do not select "recursive" option
```/usr/local/Cellar/boost/1.67.0_1/include/```
6. Goto "Library Search Paths" and add "lib" folder path of your boost lib. Do not select "recursive" option
```/usr/local/Cellar/boost/1.67.0_1/lib/ ```
7. Now you can include correct boost lib into your project like
```#include <boost/algorithm/string.hpp>```
8. I set boost folder chmod to 777 (optional)