I just installed baylor 1.1 for deken and it's working for me on macOS 10.13 + Pd 0.48-1 32 bit.

First thing to check would be if the externals are indeed compiled for 64 bit. Looks ok:

file ~/Documents/Pd/externals/bsaylor/pvoc~.d_fat

gives me

/Users/dano/Documents/Pd/externals/bsaylor/pvoc~.d_fat: Mach-O universal binary with 2 architectures: [i386:Mach-O bundle i386] [x86_64:Mach-O 64-bit bundle x86_64]
/Users/dano/Documents/Pd/externals/bsaylor/pvoc~.d_fat (for architecture i386): Mach-O bundle i386
/Users/dano/Documents/Pd/externals/bsaylor/pvoc~.d_fat (for architecture x86_64): Mach-O 64-bit bundle x86_64

Also, did you use [declare] or add baylor to your paths?

On Jul 30, 2018, at 12:00 PM, pd-list-request@lists.iem.at wrote:

Date: Sun, 29 Jul 2018 19:14:20 +0200
From: Jean-Marie Adrien <jm.adrien.mnt@gmail.com>
To: pd-list@iem.at
Subject: [PD] sound convolution / phase vocoder
Message-ID: <ECB82A02-249F-4787-8159-E88381942743@gmail.com>
Content-Type: text/plain; charset="utf-8"

Hello everyone
Still migrating to 64 bits from pd-extended, external by external
in this process, tying to use vintage objects such as pvoc~ and partconv~ which came in bsaylor, dll format :
found everything via decken, including libdir but cannot get it to work
sorry for this question : any hint to have this work with pd 47-64 bits  on mac 10.11 ?
thanks
JM

--------
Dan Wilcox
@danomatika
danomatika.com
robotcowboy.com