Dear all, For anyone that is interested in upgrading to OS X 10.11 (El Capitan), I can confirm that Nektar++ compiles, installs and passes regression tests. You will need to install the latest Xcode and install the new command line tools (go to the Terminal and run the command "xcode-select --install"). Additionally, for those that use MacPorts or Homebrew: 1) If you use MacPorts, you need to junk /opt/local and reinstall your ports. 2) If you use Homebrew, you probably need something along the lines of of brew update && brew doctor && brew upgrade. You will also need: 1) A small Nektar++ patch that can be found in the fix/osx-10.11-elcapitan branch. 2) A patch that you should apply to the boost static_assert.hpp header: https://svn.boost.org/trac/boost/ticket/11664 This will fix compiler warnings related to BOOST_STATIC_ASSERT. Cheers, Dave -- David Moxey (Research Associate) d.moxey@imperial.ac.uk | www.imperial.ac.uk/people/d.moxey Room 363, Department of Aeronautics, Imperial College London, London, SW7 2AZ, UK.