MATLAB: Unable to generate Mex function in OS X 10.9.5 and Xcode 6.2

MATLABmatlab codermexmex compiler

I'm using Matlab Coder in Matlab-r2014b in OS X 10.9.5. I have Xcode 6.2. I'm unable to generate a Mex function using Matlab compiler. I'm reporting here a sample code with structure and type of variables similar to my real one.
1) The script that calls the entry-point
    clear all
    N=3 ;              
    Res=alg(N);
2) The entry-point
function val=alg(N)
%#codegen
coder.inline('never')
coder.varsize('matrixfinal');
matrixfinal=zeros(1,3*N+2); 
profindex=randi(N+1,2^(N-1),1);
for s=1:10
coder.varsize('matrix');
matrix=zeros(1,3*N+2);
for k=1:2^(N-1)
    if profindex(k)==N-1
       matrix=[(matrix); randi(1,1,3*N+2)];
    end
end
if size(matrix,1)>1
    matrix(1,:)=[];
end
for k=1:size(matrix,1)
    for h=1:size(matrixfinal,1)
        if sum(matrix(k,2+2*N:3*N)==matrixfinal(h,2+2*N:3*N))==N-1
           matrixfinal(h,3*N+1)=matrixfinal(h,3*N+1)+matrix(k,3*N+1);
           matrixfinal(h,3*N+2)=matrixfinal(h,3*N+2)+matrix(k,3*N+2);
        end        
    end
end
end
if size(matrixfinal,1)>1
    matrixfinal(1,:)=[];
end
val=matrixfinal(1,1); 
end
When I try to built the Mex Function I get the following error
    ??? Build error: Compilation returned error status code 2. See the target build log in the report for further details.
Error in ==> alg Line: 1 Column: 1
Code generation failed: Open error report.
If I open error report, I read
   1   xcrun  -sdk macosx10.7  clang -c -fno-common -arch x86_64 -isysroot  -mmacosx-version-min=10.7 -fexceptions -DMX_COMPAT_32 -O2 -DNDEBUG  -I "....
      2   xcodebuild: error: SDK "macosx10.7" cannot be located.
      3   xcrun: error: unable to find utility "clang", not a developer tool or in PATH
      4   gmake: *** [alg_mexutil.o] Error 72
How can I solve this problem? If instead I generate C/C++ Static Library it works. I found these instructions http://www.mathworks.com/matlabcentral/answers/103904-can-i-use-xcode-5-as-my-c-or-c-compiler-in-matlab-8-1-r2013a-or-matlab-8-2-r2013b but they are for 10.8
Thanks for your help

Best Answer

Follow the instructions at that link but edit the 10.7 references to become 10.9 instead of 10.8
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