I guess I could figure out how to do that but I have been meaning to confirm/revise the instructions to verify what exactly is needed since I was fiddling quite a bit the first time. I just put the 5.02 image on a new card and here's exactly what it took to get printing from my modern Mac to my Apple LaserWriter 4/600 PS via my Pi 4B 2MB.
ssh into the default MacIP 5.02 system, cut and paste the following command one at a time:
cd; sudo wget http://www.emaculation.com/pap_tkaiser_v0.1.4.tgz
tar -xvzf pap_tkaiser_v0.1.4.tgz
sudo mv ~/pap_tkaiser_v0.1.4/pap /usr/lib/cups/backend
sudo chown root:root /usr/lib/cups/backend/pap
sudo usermod -a -G lpadmin $USER
Next you need to change the path to the Netatalk Binary Directory in the pap backend you just installed, command to edit the file with the "nano" CLI text editor:
sudo nano /usr/lib/cups/backend/pap
My way of doing this is to comment out the existing line and type in a new one below it:
#NetatalkBinDir=/usr/local/bin
NetatalkBinDir=/usr/bin
Next you need to find the URL for your AppleTalk Protocol laser printer:
sudo /usr/lib/cups/backend/pap
This takes a minute or so, here's the output I get:
network pap "Unknown" "AppleTalk Devices via pap"
atp_rresp: Connection timed out
%%[ status: idle ]%%
%%[ status: idle ]%%
%%[ status: idle ]%%
%%[ status: idle ]%%
%%[ status: idle ]%%
%%[ status: busy; source: LocalTalk ]%%
%%[ status: busy; source: LocalTalk ]%%
%%[ status: busy; source: LocalTalk ]%%
network [B]pap://%2a/4%2f600%20PS/LaserWriter[/B] "LaserWriter 4/600 PS" "4/600 PS@* (pap)"
What you need from that is the "pap://%2a/4%2f600%20PS/LaserWriter" part, that's the URL you need in the next step.
Now open the Cups web management interface on your Pi:
http://<your_pi_ip_address>:631/admin
And use the "Add Printer" button under the Printers section. I had to accept a self signed cert on the switch to https and log in with the macipgw credentials but then got to this screen where you select "AppleTalk Devices via pap":
View attachment 37907
On the next page you enter the URL:
View attachment 37908
Then the name, description, location and enable sharing:
View attachment 37904
And then select the ppd file. I got mine from an Mac OS 8.6 install on one of my old Macs. I think you might be abel to get away with picking something close or generic...
View attachment 37906
For my Apple LaserWriter 4/600 PS which has the 4MB memory upgrade this is where the memory config is set:
View attachment 37905\
And that's all that's needed to get it working, at least in my case. I originally messed with the cups.conf file but that isn't required.