deus0ww

The offset for 1.0.1 for Mac (Mac App Store version) has moved to 0x1D86B50. If you edited version 1.0, the App Store will not update the game and you will need to delete it and redownload. After editing, the app will need to be code-signed, again (as usual...). If searching in a hexeditor, look for "44 00 00 00 65 00 00 00 66 00 00 00 61 00 00 00 75 00 00 00 6C 00 00 00 74 00 00 00 47 00 00 00 61 00 00 00 6D 00 00 00 65 00 00 00 43 00 00 00 6F 00 00 00 72 00 00 00 65 00 00 00 2E 00 00 00 69 00 00 00 6E 00 00 00 69 00 00 00". This is "DefaultGameCore.ini" in UTF32LE. I used "Hex Fiend" hexeditor, which is free.

The offset for the Mac (Mac App Store version) is around 1BD58D0. Use UTF-32 (Little Endian) encoding. Search for "72 00 00 00 65 00 00 00 2E 00 00 00 69 00 00 00 6E 00 00 00 69 00 00 00" (which is "re.ini" in UTF32LE). From my limited testing, it does seem to be reading/using DefaultGameCore.ini in Contents/Resources/Data/XComGame/Config/... Note that you may need to re-code-sign the app after hexediting. This may not be necessary on a non-MAS version but I don't have a copy to check.