Installing Erlang on Mac OS X Lion (10.7) If you've just upgraded to Mac OS Lion, you might have a little trouble installing erlang. If you're like me, and would rather not spend an entire day compiling code, try running these steps below. Note, this should be run on a freshly unpacked tar ball as Erlang's make clean doesn't clean everything properly. # download the tar ball $ wget # unpack the tar ball $ tar zxvf otp_src_R13B04.tar.gz # cd to the directory $ cd otp_src_R13B04 # This will prepare the Makefile $ CFLAGS=-O0 ./configure --prefix=/usr/share/erlang --enable-threads --enable-darwin-64bit # Compile and install $ make && sudo make install Now, add the following to ~/.bash_profile: # For erlang # I read this at: ERLANG_HOME=/usr/share/erlang export PATH=$PATH:$ERLANG_HOME/bin Save .bash_profile and then run: $ source ~/.bash_profile You can check that Erlang is now working with the shell command erl