Install Solidity.txt

install solidity (instructions at https://solidity.readthedocs.io/en/latest/installing-solidity.html):

download solidity_0.4.24.tar.gz from https://github.com/ethereum/solidity/releases/tag/v0.4.24
unzip to solidity_0.4.24
install xcode

(Terminal)
$ cd solidity_0.4.24
$ ./scripts/install_deps.sh
$ mkdir build
$ cd build
$ cmake .. && make

check works
$/Users/lickivy/Desktop/DISC/solidity_0.4.24/build/solc/solc
Or
add path
$export PATH=$PATH:/Users/lickivy/Desktop/DISC/solidity_0.4.24/build/solc
$solc

tutorial at https://ethereumbuilders.gitbooks.io/guide/content/en/solidity_tutorials.html
make source.sol in current directory of your choice
$ solc source.sol

tutorial at http://www.ethdocs.org/en/latest/contracts-and-transactions/contracts.html
make helloworld.sol in current directory of your choice
$ solc helloworld.sol


IGNORE:

install homebrew (see https://brew.sh/) by $/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

install geth (instructions at https://ethereum.github.io/go-ethereum/install/#install-on-macos-via-homebrew
and
https://github.com/ethereum/go-ethereum/wiki/Installation-Instructions-for-Mac):

(Terminal)
(go to directory you want to install it in)
$ git clone https://github.com/ethereum/go-ethereum.git

install go (SUPER user-friendly alternative to c++):
$brew install go
add path
$export PATH=$PATH:/usr/local/opt/go/libexec/bin
check works
$go

$ cd go-ethereum
$ make geth

check works
$/Users/lickivy/go-ethereum/build/bin/geth version
Or
add path
$export PATH=$PATH:/Users/lickivy/go-ethereum/build/bin
$geth --help

uninstall geth, go:
remove geth, go files from above PATHs
$ brew uninstall go