Hello Everyone, my first post. I would also like to subscribe but haven't seen how yet. So I've an issue with how the 3.5.1 OSX package installs on OSX. The problem was first made apparent when trying to create a virtual environment and `pip install ZODB`, which failed as clang and the linker could not find either the include or lib directories for a dependency. By adding a -v option to the compiler options I was able to see in the compiler flags the following: -isysroot /Developer/SDKs/MacOSX10.6.sdk Which was not present in the compiler flags of other people who I was talking with. The isysroot flag changes the location of includes and libs from the system default, which would be why they can't be found. After grepping around a bit I found this file: /Library/Frameworks/Python.framework/Versions/3.5 /lib/python3.5/_sysconfigdata.py Within which are many mentions of this flag, as so: 'CONFIGURE_CFLAGS': '-arch i386 -arch x86_64 -isysroot /Developer/SDKs/MacOSX10.6.sdk -g', 'CONFIGURE_CFLAGS_NODIST': '-Werror=declaration-after -statement', 'CONFIGURE_CPPFLAGS': '-isysroot /Developer/SDKs/MacOSX10.6.sdk', 'CONFIGURE_LDFLAGS': '-arch i386 -arch x86_64 -isysroot /Developer/SDKs/MacOSX10.6.sdk -g', 'CONFIG_ARGS': "'-C' '--enable-framework' '--enable- universalsdk=/Developer/SDKs/MacOSX10.6.sdk' '--with-universal-archs=intel' '--with-computed-gotos' '--without-ensurepip' 'LDFLAGS=-g' 'CFLAGS=-g' 'CC=gcc-4.2'", among others. By running Python 3.5's sysconfig.py as a module, via `python -m sysconfig`, I see the following at the beginning of the output: Platform: "macosx-10.6-intel" Python version: "3.5" Current installation scheme: "posix_prefix" And when I simply go into python interactive mode, import sysconfig, and type sysconfig.get_platform() it returns macosx-10.6-intel. I believe somehow the platform being reported is incorrect, but looking at my environment, I do not have any kind of compiler flags or anything else like that set in my bash init files. Can someone who has a working OSX 3.5 installation check their reported platform to see what it is and if anyone has an idea as to how this information is getting into the installation and where I might change it please let me know. Sincerely, Joseph josephnunn@gmail.com