1) Go to the previously told link and click on "Download v1.5.0" under Mac OS X. That should start your download of the engine and game launcher.
2) After downloaded, unzip the file which will get you a folder that contains 3 programs.
a) one program is called the
solarus quest editor and that is where if you are ever interested, you can make you own quest.
b) The second is just called
solarus, this is where you can add all the quests you downloaded and make them available using one simple menu.
c) The third one is
solarus-run. If you place this program in the same folder that contains the data file for the quest the game will launch automatically when you run that program.
3) Then go to
https://sites.google.com/site/zeldabom/download and download version 1.1(do not click get full version here, that only gets you 1.0). Then unzip that file.
4) Now launch
solarus and click the add quest button on the lower right side. Find the folder that contains the data folder( make sure not to click the data folder itself, it won't work if you do), select it, and click open.
5) that should have added the quest so you can now see it on your quest list. Then click on the quest and click play on the right side to enjoy!