Note that with macOS Catalina (10.15.x), Apple changed the default shell for the system and user accounts to be zsh instead of bash. You shouldn't need to change it to run anything here, but I built everything using bash instead of zsh, so for reference here's how I updated my config:

chsh -s /bin/bash;
touch ~/.bash_profile;
touch ~/.bashrc;
echo "source ~/.bashrc" >> ~/.bash_profile;

And then you can use either ~/.bashrc or ~/.bash_profile to put your shell preferences in. As configured, it's preferable to put everything in ~/.bashrc since that'll be source-ed (read: "imported") by the ~/.bash_profile file. I do this typically just to try and keep things more comparable to Linux systems that I use and work with, since they tend to only use a ~/.bashrc config file and don't have the ~/.bash_profile version. Most (if not all) of the configs are compatible between macOS and Linux, so putting everything into ~/.bashrc this way can make the config more portable and reusable.

Again, the above is optional, but it's what I did, so there may be bash-specific commands referenced, and if you're using zsh you may get errors that I didn't. So please just be aware of that so that you don't get stuck or post a config-specific issue. If you'd like to request zsh support for this repo, please create an Enhancement issue on GitHub.

For the rest of the setup, the steps we'll follow are:

1. Install Homebrew, to make library installations consistent and (relatively) config-proof.
2. Use Homebrew to install the GTK+ v3 library and its dependencies.
3. Download and install a macOS compatible D Language Compiler.
4. Download the gtkd source code.
5. Build and install gtkd.

This process, all together, should take about 30-60 minutes with downloads and depending on your system specs.

• Homebrew install:

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

• Homebrew install GTK+ v3 to macOS system:

brew install gtk+3;
brew install gtkmm3;  # Optional, C++ bindings in-case you want to do C++ development.

• D Lanaguage compiler (dmd) install:

Note: gcc-9 is supported by Homebrew and it's true that gdc was pulled into mainline gcc-9 releases, but unfortunately it's not currently supported in the Homebrew install of gcc-9 for macOS systems. There's a patch or two out there to support it, but it seems like there's some D Standard Library (phobos) config/install "issues" with macOS, so it's likely it won't be included in the official Homebrew version until gcc-10. So, instead of using gdc, we'll just use the link above to install dmd from the .pkg file provided by the downloadable .dmg container.

• Download gtkd source code:
• untar and navigate into source directory, then run GNU Make to build and install gtkd.

• GTK+ Website

• gtkd Website

• D Language

• https://www.howtogeek.com/444596/how-to-change-the-default-shell-to-bash-in-macos-catalina/

• https://www.cyberciti.biz/faq/change-default-shell-to-bash-on-macos-catalina/

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