Unix and Mac to view memory usage, disk usage , TCP, UPD and othersystem information file directory

We know that , following the Linux / proc / save the system runs the following kinds of information . Such as memory , disk , CPU, network links , and so forth .

Now my question is whether there is Unix, and Mac like / proc / folder exists , please god guide, brother grateful .
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not matter, is generated by the kernel for administrators tuning kernel parameters , do not actually exist
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the same way,
http://fanqiang.chinaunix.net/a1/b5/20010512/10571821.html
Do not forget , linux but unix- oh

mac 's :
http://osxbook.com/book/bonus/ancient/procfs/
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I mean is that no matter how produced , as long as Unix, Mac there something like that can be read, I the problem is solved , it can give me an answer . Because there is no contact with fruit Unix and Mac
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Yes
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I asked , Mac and Unix like / proc / directory , what is it ? Find Answers
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Thank you to answer , Unix is almost no change . But Mac above , according to your link given fact slightly trouble. Estimated that this is no way to do it. That fraction choose to give you problems . But I do not know how to give points it ~ ! !

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have a " knot paste" button