Shaders 1.5 for MAC

Hey I kinda want to install the Shaders Mod for Minecraft because IT'S SO FREAKING AMAZING! I'm hoping someone can give me guidelines on how to install it for Mac because I can't find any good videos that seem to not work. So if you can please tell me and help me through this. I am mainly wanting this simply because of server pictures and projects also I would love a great minecraft experience.

Thank you,
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