I'm sorry if I can seem rude, but I've just wasted 16 hours to install terragear.
Why wasted?
Because if you search "how to make an airport" on the wiki, the answer says: "you need world editor and terragear". It sounds so easy... and it is for world editor. Download, install and have fun!
Then you want to test your work but... but you have to waste time because terragear is like a lottery. Maybe you can find the right files, maybe you can find the right dependences but... you have to figure out: where install the files, where to search for every error you get, where to find the latest files to download.
I try to ask once again: it's possible to have a procedure to install and use Terragear on a Mac? Elsewhere just say no and I'll stop to waste my time trying to be useful.
Thank you.