On Jun 18, 2020, at 5:37 PM, pd-list-request@lists.iem.at wrote:

Message: 1
Date: Thu, 18 Jun 2020 08:00:32 -0400
From: mitchell turner <mmturner2468@gmail.com>
To: pd-list@lists.iem.at
Cc: peterparker@fastmail.com
Subject: Re: [PD] Quicktime Synth via IAC Bus from Pd?
Message-ID: <9F19D16E-1012-4B81-8D83-36F971252F86@gmail.com>
Content-Type: text/plain; charset="utf-8"

Peter,
I have not been able to find a simple MIDI test synth either. So, I made one using Max. It is very, very simple, made for testing only. It may do want you want. You can find it here:
http://home.lagrange.edu/mturner/MitchWebSite/max_and_pd_stuff.html<http://home.lagrange.edu/mturner/MitchWebSite/max_and_pd_stuff.html>  

Apologies if I have replied incorrectly, I only get the digest version of the PD List. 

Hope it helps,
Mitch

On Jun 18, 2020, at 4:25 AM, pd-list-request@lists.iem.at wrote:

Message: 4
Date: Thu, 18 Jun 2020 10:26:05 +0200
From: "Peter P." <peterparker@fastmail.com <mailto:peterparker@fastmail.com>>
To: pd-list <pd-list@lists.iem.at <mailto:pd-list@lists.iem.at>>
Subject: [PD] Quicktime Synth via IAC Bus from Pd?
Message-ID: <20200618082605.btuqo77yycekwuip@fastmail.com<mailto:20200618082605.btuqo77yycekwuip@fastmail.com>>
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Hi list,

when I still had to use OS X there was the Quicktime synthesizer
available as a Midi software synthesizer in the OS. 
It was quite handy to quickly play a few notes from Pd's Midi objects.
It seems to be gone from current (mobile-phone-like) versions of OS X. Is
this correct? Is there an alternative inside the OS or can anyone
recommend a good (preferable open source) replacement that works over
the IAC bus?

Thanks!
P