macOS Catalina 10.15.7
Had Steam verify the BattleTech install.
Removed v6.1.5, downloaded v6.1.6, expanded it, and placed it in the "My Games\BattleTech\Mods" folder.
HyadesRim splashscreen appears upon game launch. HyadesRim mod shows as enabled in "Mods." No other mods present or active.
Unable to start either a new Campaign or Career. Game hangs with a continous white circle top left.
Located a xxxModLoader.txt file in the "DumpBox" folder.
These are the only warnings in the file:
ModLoader [WARNING] Warning: Could not find an existing VersionManifest entry for turretdef_Heavy_Command!
ModLoader [WARNING] Warning: Could not find an existing VersionManifest entry for turretdef_Light_Command!
ModLoader [WARNING] Warning: Could not find an existing VersionManifest entry for turretdef_Standard_Command!
Final Entry in xxxModLoader.txt was:
Merge performed: faction_TaurianConcordat.json
ModLoader [LOG] Data/StreamingAssets/data/factions/faction_TaurianConcordat.json
ModLoader [LOG] ../../../../../../../../../My Games/BattleTech/mods/HyadesRim/factions/base/faction_TaurianConcordat.json
ModLoader [LOG]
ModLoader [LOG] Add/Replace: "HBS/Cache/Data/StreamingAssets/data/factions/faction_TaurianConcordat.json" (FactionDef)
ModLoader [LOG]
Let me know if there is more specific information that may be helpful and thank for looking