Install s3g-dsp CLAP Plugins

The packaged pre-release supports REAPER on Apple silicon (arm64) Macs. It is not notarized, so macOS requires one Gatekeeper approval for the installer.

Standalone applications are separate downloads with their own installers. See Standalone Apps and the No Input Mixer Standalone guide; the app does not require REAPER or the CLAP archive.

Download and Install

Quit REAPER, download the macOS CLAP zip from the GitHub releases page, and unzip it.
Double-click Install s3g-dsp CLAPs.command in the unzipped package.
If macOS blocks it, click OK, open System Settings > Privacy & Security, and choose Open Anyway. Confirm Open and authenticate if asked. This option is available for about one hour after the blocked launch.
If prompted, allow Terminal to access the downloaded package, then wait for installation to finish.
Start REAPER and rescan CLAP plugins if the new builds do not appear automatically.

See Apple's Open a Mac app from an unknown developer for the same approval process. If a binary is unavailable, see Building From Source.

Install Location and Safety

~/Library/Audio/Plug-Ins/CLAP/s3g-dsp/

On upgrades, the installer moves identity-verified older s3g-dsp bundles—including copies in the former top-level CLAP location—to a timestamped backup. Other CLAP products are untouched.

The installer verifies each bundle, removes only com.apple.quarantine from its staged s3g-dsp copies, and preserves other extended attributes. It writes to the current user's Library without sudo and does not change global Gatekeeper settings or unrelated plugins.

Approval applies to the installer; REAPER should not show a separate Gatekeeper dialog for each plugin afterward.

Manual Installation

Use this only for a fresh manual install; it cannot migrate older top-level copies or retire renamed aliases. In Terminal, type cd followed by a space, drag the unzipped s3g-dsp-macos-clap-0.6.0-pre folder from Finder into the Terminal window, and press Return. Then run:

destination="$HOME/Library/Audio/Plug-Ins/CLAP/s3g-dsp"
mkdir -p "$destination"
for bundle in ./*.clap; do
  installed="$destination/$(basename "$bundle")"
  ditto "$bundle" "$installed"
  xattr -drs com.apple.quarantine "$installed"
done

If a Plugin Does Not Appear

Confirm that its complete .clap bundle is in ~/Library/Audio/Plug-Ins/CLAP/s3g-dsp/.
Rescan CLAP plugins in REAPER, then restart the host.
If REAPER shows per-plugin Gatekeeper dialogs or duplicate names, quit REAPER and rerun the packaged installer. If the installer itself is blocked, repeat the Open Anyway step within one hour.

For routing after installation, see Multichannel, Stereo Listening, or Ambisonics.