This is an "unofficial" release (aka not by Apple).
The sources of the GS/OS was leaked on the internet in 2013.
In case you want to build it yourself, there is a video tutorial:) https://www.youtube.com/watch?v=L1tLhckz5q4 You need a mac (pre OSX)
In case you want to build it yourself, there is a video tutorial:) https://www.youtube.com/watch?v=L1tLhckz5q4 You need a mac (pre OSX)
Long live the retro-computing revolution!