custom stories partially working?

[nic572]

i use a mac. i have had the issue of some custom stories that i download not appearing in my amnesia custom stories menu, while im in the game

i have read a few other similar problems with custom stories but none of them have helped me out

a few custom stories i download work and some custom stories i download dont work at all, even after extracting a RAR file into zip or unzipped form nothing seems to work

its mostly the rar files i think is what are giving me trouble
for reference the most recent custom story i downloaded before posting this was

http://www.moddb.com/mods/a-late-night-d...version-10 here

ive checked alot of videos and other peoples problems over the subject and im using this sortove as a last resort. all comments are appreciated, thanks for reading

[ oh also i forgot to mention i have the steam version of the game so the file directory for it is library/apllication support/steam/steam apps/common/amnesia the dark descent/custom_stories ]

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mac information

MacBook Pro (13-inch, Mid 2009) Yosemite 10.10.1