diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
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@@ -118,7 +118,7 @@ This command typically compiles TypeScript to JavaScript, bundles assets, and pr
 
 ### Enabling Sandboxing
 
-Container-based [sandboxing](#sandboxing) is highly recommended and requires, at a minimum, setting `GEMINI_SANDBOX=true` in your `~/.env` and ensuring a container engine (e.g. `docker` or `podman`) is available. See [Sandboxing](#sandboxing) for details.
+[Sandboxing](#sandboxing) is highly recommended and requires, at a minimum, setting `GEMINI_SANDBOX=true` in your `~/.env` and ensuring a sandboxing provider (e.g. `macOS Seatbelt`, `docker`, or `podman`) is available. See [Sandboxing](#sandboxing) for details.
 
 To build both the `gemini` CLI utility and the sandbox container, run `build:all` from the root directory: