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macOS CoD: Black Ops 3 Multiplayer Fix
By Mykola Petrovych
This guide will help you to fix multiplayer on the macOS version of Call of Duty: Black Ops 3. Remove the lunch client and fix a lot of other bugs in the game.
   
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Created by
Mykola Petrovych
Offline
Category: Modding or Configuration, Multiplayer
Languages: English
Posted
25 Nov @ 7:09am
313 Unique Visitors
3 Current Favorites
Guide Index
Overview
Changes Summary 
Installing Components to Run Fix 
Installing BO3MacFix 
[On ERROR] If the Game Freezes at Lunch 
[On ERROR] OS Error 260 
Comments
Changes Summary
List of changes we are going to do:
  • We will install components necessary to run BO3MacFix
  • Install BO3MacFix from the GitHub repository
Installing Components to Run Fix
First, we will need a Homebrew package manager. Skip this step if you already have it. To learn more about Homebrew, visit this website: https://brew.sh/.

Open terminal and paste this command:
/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"

Now, using Homebrew, we will install Wine. Paste this command into the terminal:
brew install --cask --no-quarantine wine-stable
Installing BO3MacFix
Now, let's install our BO3MacFix from https://github.com/InvoxiPlayGames/BO3MacFix.

First, we download the archive with the fix into the game folder. Paste this command into the Terminal:
cd "$HOME/Library/Application Support/Steam/steamapps/common/Call of Duty Black Ops III" && curl -L -O https://github.com/InvoxiPlayGames/BO3MacFix/releases/download/1.2-beta3/BO3MacFix-1.2-beta3.tar.gz

Extracting archive:
tar -xzf BO3MacFix-1.2-beta3.tar.gz && rm BO3MacFix-1.2-beta3.tar.gz

Running installer:
cd BO3MacFix && ./Install_BO3MacFix

Select "Install BO3MacFix":
1

Close the terminal and try to launch the game in Steam.
[On ERROR] If the Game Freezes at Lunch
If you launched the game through Steam and no game window or errors appeared, then follow this section's steps to fix it.

Open terminal and run installer one more time:
sudo "$HOME/Library/Application Support/Steam/steamapps/common/Call of Duty Black Ops III/BO3MacFix/Install_BO3MacFix"

Enter the password from the OS, the one you enter when logging into your computer. Not the iCloud password. You will not see symbols appear, but keep typing, this is how it is supposed to function.

Select "Update/reinstall BO3MacFix":
1

Close the terminal and try to launch the game in Steam.
[On ERROR] OS Error 260
If you see a message from Steam, "Failed to start process for this game : OS Error 260" then follow this section's steps to fix it.

First, we will fix file permissions in game files. Open terminal and enter:
sudo chmod +x "~/Library/Application Support/Steam/steamapps/common/Call of Duty Black Ops III/CoDBlkOps3.app/Contents/MacOS/AppBundleExe"

Then, we will fix extended attributes of the files. Enter:
sudo xattr -rd com.apple.quarantine "~/Library/Application Support/Steam/steamapps/common/Call of Duty Black Ops III/CoDBlkOps3.app"

Close the terminal and quit Steam with the ⌘+Q combination. Try to launch the game in Steam.