Originally posted by Happyculture:

Hey there! I managed to get UCP to work on MacOS using these steps:

A. Download patch etc. and unzip files. You need the MacOS version which was 6.3b for me and obtained from moddb.com. I did not subscribe to UCP on Steam Workshop since the stated version was 6.3a.

B. There are three things to look for in the unzipped files: (1) Assembly-Csharp.dll in the STEAM-OSX folder; (2) StreamingAssets folder in the Common folder; (3) Unofficial Code Patch folder in the Common folder

C. In your Steam Library, right-click Master of Orion, select Properties, select Local Files, click on Browse to open a Finder window where the game files are stored.

D. In this new Finder window, right-click on MasterOfOrion.app and select Show Package Contents. Then navigate to Contents / Resources / Data / Managed and copy Assembly-Csharp.dll from the STEAM-OSX folder into this folder.

E. Navigate to Contents / Resources / Data / Streaming Assets. We need to copy the contents of the StreamingAssets folder in the Common folder into here, but cannot use normal methods of mass file copying as the patch files are older than the newly created game files if recently installed from Steam so merging will keep the wrong files, and the file/folder structures are not identical so overwriting will delete needed files.

F. Open the Terminal.app which should be in your Utilities folder. Use the ditto command to copy the StreamingAssets folder in the Common folder to the StreamingAssets folder in the game files. The basic syntax will be “ditto source-path destination path/“. For example (where UserName is your user name):

ditto /Users/UserName/Downloads/UnofficialCodePatch-Release/UnofficialCodePatch/Common/StreamingAssets /Users/UserName/Library/Application\ Support/Steam/steamapps/common/Master\ of\ Orion/MasterOfOrion.app/Contents/Resources/Data/StreamingAssets/

You can type ditto and then drag the source and destination folders into Terminal to copy the path names, as your files might be stored differently. Remember to add a / at the end of the destination path name otherwise the files will be copied one level too deep.

G. Navigate to the general Master of Orion folder, which is not the Steam folder where the game files are stored. You can search in Finder for Master of Orion. The path will probably be /Users/UserName/Master\ of\ Orion

H. Then navigate to Master of Orion / Mods and copy the Unofficial Code Patch folder in the Common folder into here. You should see Master of Orion / Mods / Unofficial Code Patch / a bunch of .yaml files

I. That should be it! Run the game and with any luck you will see the UCP version number at the top right of the Main screen. Click on Mods to see the UCP listed and active.


Hopefully this works for you. I gleaned a lot of this from various people who posted their solutions in the past, so full credit to them