These instructions show how to setup a basic VLFeat project with Apple Xcode. For the sake of simplicty, we create a command line tool written in C. However, these steps apply with minor modifications to other project types and to the C++ lanuage.
First, let us create a new project
  called vlfeat-client. Open Xcode and select File
  > New Project > Command Line Utility > Standard Tool
  and click Choose. Give a name to your project (in our
  case vlfeat-client), and click Save.
 
 Now we need to add VLFeat to the C compiler include search
  path. To do this, select the vlfeat-client target and
  open the information panel (the blue button,
  or Command-i). Then select the Build panel, search for
  the field Header Search Paths, and add
  VLFeat root path (in our case this is
  just ~/src/vlfeat).
 
 Next, we add the libvl.dylib library file to the
  project resources so that Xcode links against it. To do this, drag
  and drop the libvl.dylib file (in our example
  ~/src/vlfeat/bin/maci/libvl.dylib) to the left panel and click
  Add.
 
 Next, edit the main.c source file and type the following code:
 
 If you try to build the project, it should compile without errors
  (if you are using C++, do not forget to wrap the include
  statements in a extern "C" {} block). However, if you try
  to run the program, it will fail, complaining that it cannot find the
  library image.
 
 The reason is that libvl.dylib is compiled with the
  library install_name equal
  to @loader_path/libvl.dylib. This causes the run-time
  loader to look for the library in the same directory of the
  executable. There are two ways around this problem: The first is to
  install the library in a standard location
  (e.g. /usr/local/lib) and use the otool
  command to change the
  library install_name. The other is to simply copy
  the libvl.dylib file in the executable directory. Here we
  demonstrate the second technique.
To copy libvl.dylib in the executable directory, we
  add a Copy Files build phase to the project. Right-click
  the vlfeat-client target in the project panel and select
  Add > New Build Phase > New Copy Files Build
   Phase. Select Destination: Executables. Then drag-and-drop
  the libvl.dylib item from the panel to the Copy
   Files build phase.
 
  
 Now rebuild the project, and run it. It should run correctly, and if you open the debugger console you should see this:
