411 REFERENCE · Wikibooks
Celestia/Development/MacOS platform
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
Install XCode Tools
If you've not already done so, install Xcode 10 from Apple.
GitHub
Before compiling Celestia, you must obtain the source code.
The very latest source code is kept in Celestia's GitHub repository. You can get the source code by following these instructions:
Open Terminal
See if Git is installed on your system. Type "git" in the terminal (without the quotes.) If you get a "command not found" error message, you need to install Git. See this guide for information on installing Git on Mac OS X.
Type, or paste in: git clone https://github.com/CelestiaProject/Celestia.git
Wait for a while, until the download is complete.
cd Celestia and follow instructions from https://github.com/CelestiaProject/Celestia/blob/master/INSTALL.md