Install the macOS host

Goal

Install the host app without mixing it with a source-build staging directory.

Prerequisites

• macOS 13 or later.
• The New Old World release DMG.

Steps

1. Quit any older copy of New Old World.
2. Open the DMG and move New Old World.app to Applications or another stable local folder. The classic app, Extension, update sidecars, CarbonLib installer, and license material are embedded inside the host app; they move with it and do not depend on the mounted DMG remaining available.
3. Launch that copy and open Connections.
4. If macOS refuses the build, retain the exact Gatekeeper message and verify the artifact source. Do not strip signatures or quarantine attributes as a routine installation step.

Expected result

The host opens its native window and can start a listener. No classic Mac is required merely to launch the host.

Related reference

Requirements and Connections.