Placing a custom Map in Stronghold 3 on Mac OS X

In order to place a custom or user map into Stronghold 3 you wil need to place the file in the following location on your oSX system 



"Users/YourUsername/Library/Application Support/com.vpltd.Stronghold3/GameDocuments/Stronghold3/Maps"


If you are unsure how to find the library or how to get to it please follow the instruction in the article below:  Source : http://osxdaily.com/2011/07/22/access-user-library-folder-in-os-x-lion/

Easy Access by Permanently Revealing User Library Folder in OS X Mountain Lion & Lion

To access the user library folder on a Mac with OS X Mountain Lion or Lion, issue the following command syntax into the Terminal app, this will toggle the hidden aspect of the folder to be visible again.
chflags nohidden ~/Library/
Hit the return key to execute the command.
That chflags string permanently makes the ~/Library folder visible, and you’ll find it again in your home directory:

By the way, this chflags trick works to permanently show the User Library folder in macOS High Sierra and Sierra too, as well as El Capitan and other modern versions of Mac OS X system software.
With that said, for most users that simply isn’t necessary because they won’t be accessing the Library directory or its contents enough to make it worthwhile. Instead, you can use a trio of tips to quick and temporarily access your ~/Library/ directory, while still retaining it’s default hidden nature.

Use “Go To Folder” and Open ~/Library/ Directly

All you need to do is hit Command+Shift+G from the Mac desktop (or Finder > Go > Go to Folder) and type in ~/Library to temporarily access the Library directory in the Finder. When you are done, close this window and it will no longer be visible.

Hold Option and Use the “Go” Menu to Show Library

Holding down the Option key will show the “Library” directory as an option in the Finders Go menu. The other nice thing about the Go menu is that after you have accessed ~/Library on multiple occasions, it will start to appear in the “Recent Folders” submenu for easy repeat access.

Access ~/Library from the Terminal

There are a few approaches to the Terminal access of ~/Library, one is to just manually manipulate the filesystem from the command line:
cd ~/Library
You can then manipulate directories or do what what you want in here. If you’re not comfortable with that, you can also just use the ‘open’ command to access ~/Library in the Finder, via the Terminal:
open ~/Library/