How to 安裝 mod in mac book pro (Minecraft SP)?
Eg. How to open minecraft.jar (There is no Winrar or 7-zip for mac)

你可以使用betterzip，izip，或是the unarchiver把minecraft.jar打开。betterzip打开之后把mod往里拽就好了。izip和the unarchiver打开后变成folder，把mod扯进去了以后压缩，最后再把zip后缀改成jar就好了。

同作为mac使用者，你有什么不会的可以来问我，咱用mac混了好多年了~

话说lz天朝人还是外国人？

Thanks
I am Chinese.
I am just too lazy to type Chinese

cool, after learning english i got say english is much more convenient
btw feel free to ask me further questions~:)