[Biopython] installation failure on mac OS10.6.7

[Dilara Ally]

Hi,

I was trying to install Biopython on mac OS 10.6.7.  I checked the 
archives and installed Apple's Xcode ver4.0.2.  But I got this error 
message:


building 'Bio.cpairwise2' extension
gcc-4.0 -fno-strict-aliasing -fno-common -dynamic -arch ppc -arch i386 
-g -O2 -DNDEBUG -g -O3 -IBio 
-I/Library/Frameworks/Python.framework/Versions/2.6/include/python2.6 -c 
Bio/cpairwise2module.c -o 
build/temp.macosx-10.3-fat-2.6/Bio/cpairwise2module.o
unable to execute gcc-4.0: No such file or directory
error: command 'gcc-4.0' failed with exit status 1

Thanks so much for the help.

Cheers, Dilara