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I downloaded a custom map but I don't know where to put it in order for it to appear in the Custom Game map selection menu. Does anyone know where is this custom map folder ? I play on MacOS X but I think the only difference between the Windows and the MacOS version is only the installation path.

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For people who found this thread looking for the location of the maps they downloaded in SC2: the program StarBank (Written by a very mysterious and handsome gentleman) will do that for you. However, that there currently is no Mac support... – BlueRaja - Danny Pflughoeft Nov 16 '13 at 2:32
up vote 4 down vote accepted

Actually, the way Blizzard has custom games working at the moment, it is not as simple as navigating to a folder to select the map. Many view this as a downfall in their current system, but this site is not the place for such arguments.

Rather, to answer your question, the only way for you to play this map is to either find it in the search engine for custom games online or to publish it yourself. Ideally, you can find it in the search engine online, but there are a limited number of maps that appear in that, so if the map you want to try is unpopular, your only option is to publish it yourself.

You have to open the map in the map editor and publish it just as you would any of your own maps. Unfortunately, this will create a copy on their server, and anyone found playing your copy will be counted differently from the original author's copy, which means that the stats for determining popularity will treat them as separate maps even though they are the same. It is very difficult for a new map to make its way up through the popularity list with this system.

This Team Liquid forum post goes into great detail about the shortcomings of the current custom map system and the workarounds for it.

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The best solution to play a custom map is to publish it oneself if the map is not part of the top 50. Too bad for the author, I hope this system will change. – Opera Sep 25 '10 at 7:40

The FAQ of the StarCraft 2 Map Editor (called "GalaxyEditor") gives some short information about the location and handling of custom maps:

How can I play maps i've previously downloaded? (Including the official maps)

Your downloaded maps can be found two different ways. The easiest of the two, is to go to File > Open > Tab within GalaxyEdit. Otherwise, you need to search your Cache for "*.s2ma" and then convert the .s2ma file to .SC2Map. However, the .s2ma filenames are just hashes of their true name, so good luck trying to find the map you need!

The cache can be found at: C:\ProgramData\Blizzard Entertainment\\Cache -- Win Vista/7 C:\Documents and Settings\All Users\Application Data\Blizzard Entertainment\\Cache\ -- Win XP

The folder containing Maps created by GE can be found: %USERPROFILE%\Documents\StarCraft II\Maps

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You can open it in StarCraft II Editor and then click File/Test document.

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Download the map file,
Place in a folder I name mine Starcraft2 maps,
Open new folder containing your downloaded maps
Right click on a map choose "Open With"
click browse and find your starcraft launcher file
Mine is Here C:\StarCraft II
Once in this folder click the file StarcraftII
Click Open
"NOTE" Make sure the check box is marked that says
"Always use the selected program to open this kind of file"
Then click OK

If the checkmark box is checked you will not need to do any of this again you will just need to go to your new maps folder and double click on the map for future play :)

The map will then open in Starcraft II and you can play it.

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