===== Install polymake on Mac OS =====

The latest release 4.9 should work on all Mac OS versions greater or equal to 11. The installation requires a couple of steps (of which you have maybe done some already for other reasons):
  * Install the xcode command line tools
  * install Homebrew
  * install Perlbrew
  * install some dependencies using Homebrew
  * install some dependencies using Perlbrew/cpanm
  * install a python dependence
  * download and install polymake

For all steps you need an open Terminal. You can find the Terminal app in the Subfolder //Utilities// of //Applications//.

If you don't want to install Homebrew, you can try to install dependencies yourself. Some instructions are [[install:macos:source|here]].

==== Install the Command Line Tools ====

In the terminal type
<code>xcode-select --install</code>
Either this tells you that your command line tools are installed or opens a small window that asks you whether you want to install them. Confirm. It also offers to install the full XCode IDE. This is **not** necessary and **not** recommended (you then need to install the command line tools on top from within XCode). 

==== Install Homebrew ====

Installation instructions are [[https://brew.sh/|here]]. In most cases it should be sufficient to copy and execute the first code line on that page into your terminal, that is:

<code>
/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
</code>

==== Install Perlbrew ====

Installation instructions are  [[https://perlbrew.pl/|here]]. In most cases it should be sufficient to copy and execute the first code line on that page into your terminal, that is:

<code>
\curl -L https://install.perlbrew.pl | bash
</code>

We have to add some variables to the shell environment. Recent macs usually use ''zsh'' as their shell. You can check this with
<code>
echo $SHELL
</code>
If you use ''bash'', you have to 
  * replace ''.zshrc'' with ''.bashrc'' in the terminal commands below 
  * add <code>if [ -f ~/.bashrc ]; then . ~/.bashrc; fi </code> at the end of the file ''$HOME/.bash_profile'' if it is not already present

Now add some paths to your Terminal config and reload the config. For an Intel Mac type the following lines in the terminal:
<code>
echo "export PERL5LIB=$HOME/perl5/lib/perl5:$HOME/perl5${PERL5LIB+:$PERL5LIB}" >> $HOME/.zshrc
echo "source ~/perl5/perlbrew/etc/bashrc" >> $HOME/.zshrc
echo 'export ARCHFLAGS="-arch x86_64"' >> $HOME/.zshrc
source $HOME/.zshrc
</code>
and for a Silicon Mac use
<code>
echo "export PERL5LIB=$HOME/perl5/lib/perl5:$HOME/perl5${PERL5LIB+:$PERL5LIB}" >> $HOME/.zshrc
echo "source ~/perl5/perlbrew/etc/bashrc" >> $HOME/.zshrc
echo 'export ARCHFLAGS="-arch arm64"' >> $HOME/.zshrc
source $HOME/.zshrc
</code>


==== Install dependencies with Homebrew ====

Run the following lines in your terminal:
<code>
brew install gmp
brew install mpfr
brew install boost
brew install readline
brew install ppl
brew install flint
brew install singular
brew install python3
brew install ninja
brew install ccache
brew install mongo-c-driver
brew install jupyterlab
</code>

==== Install dependencies with Perlbrew ====

Run the following lines in your terminal:
<code>
yes N | perlbrew install-cpanm
cpanm --local-lib=~/perl5 local::lib && eval $(perl -I ~/perl5/lib/perl5/ -Mlocal::lib)
cpanm SVG
cpanm JSON
cpanm install Net::SSLeay
cpanm Term::ReadLine::Gnu
cpanm Term::ReadKey
cpanm XML::SAX
</code>


==== Download polymake ====

You find the sources [[download:start|here]]. Get the source tarball from the Linux section of that page. Download to //Downloads//.

In the terminal do
<code>
cd Downloads
tar -xvjf polymake-4.11.tar.bz2
</code>

==== Configure and install polymake ====

=== Compilation ===

Essentially, polymake is compiled and installed with the following commands. This will put the polymake binary into ''/usr/local''. You may have to use ''sudo'' for installing.

<code>
cd ~/Downloads/polymake-4.11
./configure --without-java
ninja -C build/Opt -j2 install
</code>

However, we recommend to install into a directory in your ''$HOME''-folder. For this, create a folder with
<code>
mkdir $HOME/<polymake_install_folder>
</code>
where ''<polymake_install_folder>'' is a name of your choice, e.g. ''polymake_bin''. Then compile and install with (replace with the correct folder name!)

<code>
cd ~/Downloads/polymake-4.11
./configure --without-java --prefix=$HOME/<polymake_install_folder>
ninja -C build/Opt -j2 install
</code>

You can then call ''polymake'' with
<code>
$HOME/<polymake_install_folder>/bin/polymake
</code>
or add ''$HOME/<polymake_install_folder>/bin/'' to your path.

=== Configuration ===

If you use ''Safari'' as your default browser, then you need to switch to another one for polymake. Please do
<code>
set_custom $Visual::webbrowser="open -a Firefox";
</code>
inside the polymake shell. Replace ''Firefox'' by ''Google Chrome'' if you prefer this browser.