couldn't understand kern.osversion `14.4.0'

[zmactep]

Yosemite 10.10.4

Getting an error during boost-std installation.

$ brew install caffe
==> Installing caffe from mitmul/homebrew-caffe
==> Installing dependencies for mitmul/caffe/caffe: boost-std, snappy-std, leveldb-std, protobuf-std, gflags-std, glog-std, opencv-std
==> Installing mitmul/caffe/caffe dependency: boost-std
==> Downloading http://downloads.sourceforge.net/project/boost/boost/1.55.0/boost_1_55_0.tar.bz2
Already downloaded: /Library/Caches/Homebrew/boost-std-1.55.0.tar.bz2
["--with-python=/usr/local/opt/python/bin/python", "--with-python-root=/usr/local/Cellar/python/2.7.10_1/Frameworks/Python.framework/Versions/2.7", "--without-icu", "--without-libraries=mpi"]
["--prefix=/usr/local/Cellar/boost-std/1.55.0", "--libdir=/usr/local/Cellar/boost-std/1.55.0/lib", "-d2", "-j8", "--layout=tagged", "--user-config=user-config.jam", "install", "threading=single", "link=static"]
==> ./bootstrap.sh --with-python=/usr/local/opt/python/bin/python --with-python-root=/usr/local/Cellar/python/2.7.10_1/Frameworks/Python.framework/Versions/2.7 --without-icu --without-libraries=mpi
==> ./b2 --prefix=/usr/local/Cellar/boost-std/1.55.0 --libdir=/usr/local/Cellar/boost-std/1.55.0/lib -d2 -j8 --layout=tagged --user-config=user-config.jam install threading=single link=static
...skipped <pbin.v2/libs/wave/build/darwin-4.2.1/release/link-static>libboost_wave.a for lack of <pbin.v2/libs/wave/build/darwin-4.2.1/release/link-static>instantiate_cpp_exprgrammar.o...
...skipped <p/usr/local/Cellar/boost-std/1.55.0/lib>libboost_wave.a for lack of <pbin.v2/libs/wave/build/darwin-4.2.1/release/link-static>libboost_wave.a...
...failed updating 10 targets...
...skipped 9 targets...
...updated 11343 targets...
couldn't understand kern.osversion `14.4.0'

READ THIS: https://git.io/brew-troubleshooting
If reporting this issue please do so at (not Homebrew/homebrew):
  https://github.com/mitmul/homebrew-caffe/issues

[mitmul]

Now CUDA 7.0 supports libc++, so after installing CUDA 7.0, this tool, homebrew-caffe, is never needed. Please install boost, snappy, leveldb, protobu, gflags, glog, and opencv normally with homebrew without this tap. And download caffe from official page and build it under the instruction for OSX described on the official page.