On Dec 10, 2020, at 11:26 AM, pd-list-request@lists.iem.at wrote:

Message: 2
Date: Thu, 10 Dec 2020 10:18:59 +0100
From: Max <abonnements@revolwear.com>
To: pd-list@lists.iem.at
Subject: Re: [PD] Apple's GM MIDI player in Pd?
Message-ID: <fbfe7571-b0ca-7661-c53f-ad3f2d3fe20a@revolwear.com>
Content-Type: text/plain; charset=utf-8; format=flowed

Back in the days when I still was an Apple user, there was simplesynth.
https://notahat.com/simplesynth/
maybe it still works if it wasn't broken by one of the OS updates...