Okay, Mac! I'll give a bit of summary for each.
Is Mac...God? —A lot of talk of gods/deities in this one.
Who's Mac? —Looks to be one of the original Mac threads.
Theories on Mac —More o' the same. One of the first threads I posted in IIRC.
Talks about WC connections for a lot of it.
Mac —White God theory yet again.
Who is Mac (heorot spoilers) —Norse Pantheon, Merlin, Elvis, Tom Bombadil, etc.
Who is McAnally? —Okay, an earlier one than the other. Typical merlin/deity posits.
McAnally & His Bar —Maybe THE original Mac thread. A lot of talk about Mac being a retired version of Kincaid. Linked to by Priscellie, incidentally, in the Who is McAnally? thread.
McAnally and the Accords? —Specifically about Mac in relation to the Accords, and Neutral Territory.
What About Barkeep? —Dragon, Merlin, God, Bombadil, the Gatekeeper, God of Beer, Vanilla.
The word of Mac 2.0 —Norse pantheon, again, vanilla, a god of beer, ex-special-ops guy, white god, Mr. Clean (courtesy of Mickey), van helsing, ex-wizard, Kvothe, Dagda, Cowl, changeling. Oh wait, also proposed Mad = Jim.
Mac's true id —More Norse. Ex-wizard. Same old, same old.
Who, or what, is Mac? —Ivy's father, Mister, former Gatekeeper, Hound of Ulster. Jim.
Mac's identity finally revealed —Bombadil. Aberforth Dumbledore. NSA man. Ex-warden.
Mac —NSA man, God.
Why did Mac come to Chicago? —Venatori Umbrorum.
A theory about Mac —Wizard, changeling, venatori, powers that withered like Mortimer's, former blackstaff, dragon, djinn, agent of god, black cat.
Mac and Ivy Possible stretch --- or is it? (SmF Spoilers) —Ivy's grandfather. Shepherd Book and the Operative, thank you Priscellie, Shecky.
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One more:
Is Mac (from McAnally's) the Original Merlin Same old same old—but in poll format.
Okay, made it through all 87 pages of the Spoilers. These are the major ones.