I have the forge installer.zip file, but for the life of me I cannot get it to open (If I use text edit, I can see the coding, but not sure what to do with that) and things like winrar/unrar and 7zip aren't helping. I've tried everything, and on youtube there doesn't seem to be any help.
Read more: How to download Minecraft Forge 1.6.4 on my Mac OS X 10.5.8?