OS X Where to find Starcraft 2 replays on Mac?

Are you in your user Library, or the system Library? In Finder, Go > Go To Folder... (or Command-Option-G) and type in

~/Library/Application Support/Blizzard/StarCraft II/Accounts/

Since I was searching for this myself.

Here are three ways listed: http://helpx.adobe.com/x-productkb/global/access-hidden-user-library-files.html

I used the

Method 3

The following method makes the user library folder permanently visible.

Note: Adobe recommends that only advanced users use this method.

Launch Terminal from Mac HD > Applications > Utilities.
From within Terminal type the following command and press Return:

chflags nohidden ~/Library
Enter the system administrator password, if prompted, and press Return.

Note: The System administrator password is not visible as you type it.

While this is an old thread, in SC2 when you're looking at your list of replays there is a button in the upper right corner that looks like a series of folders. Clicking it will open a new Finder window and show you the replay in question (the folder it opens contains all your replays).

I'm not in the habit of renaming my replays, so I find this the easiest way instead of looking through all the "Newkirk Precinct TE" replays for the specific one.