Fix Media: x86-64 / GModPatchTool Guide (macOS)

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Visual Install Guide:

Step 1

First, close Garry's Mod.

Then open Steam, and right click Garry's Mod from your Library games list. Select Properties from the menu.

Steam > Garry's Mod > Properties

In the Properties window, select "Betas", then click on the Dropdown menu and select "x86-64 - Chromium + 64-bit Binaries"

Steam > Garry's Mod > Properties > Betas

Now you can close the properties window and wait for the update to download. Once it's done, proceed to the next step.

Download the Latest Release of GModPatchTool for macOS.

GModPatchTool Logo GModPatchTool

Extract (unzip) GModPatchTool-macOS.zip.

Open the .dmg file (this will mount it).

Open GModPatchTool.dmg

Accept the license terms.

Accept the license terms

Then drag GModPatchTool into the Applications folder shortcut to install it.

Drag GModPatchTool to the Applications folder

Proceed to the next step.

Run GModPatchTool from your Applications folder.

macOS Applications Folder with GModPatchTool

GModPatchTool should now patch Garry's Mod. It may take some time depending on your internet connection speed.

GModPatchTool patching GMod

Once it's done, you can launch GMod from Steam.

GModPatchTool applied successfully

Congratulations, you're done! 🎉

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❌ Having issues?

⚙️ Advanced Options

Proceed to the next step if you'd like to see Advanced Options for:

  • Auto-launching GMod after patching

Auto-launching GMod after patching

This enables you to configure GModPatchTool to launch GMod immediately after successfully patching.

Open Script Editor and create a New Document. Then enter these contents:

do shell script "/Applications/GModPatchTool.app/Contents/MacOS/gmodpatchtool --launch-gmod --skip-exit-prompt" quit Script Editor with contents typed

Save your document as RunGModPatchTool.app with the Application File Format.

Script Editor Save Dialog

You should now be able to simply double click RunGModPatchTool.app to patch GMod and then run it without prompting you on close.