Hi,

For collaboration with AutoCAD for Windows users you can add "special" printer in macOS System Preferences and give it the name exactly the same as the name of .PC3 file. For example if on Windows side you have "AdobePDF.pc3" printer configuration file, you need to give one of the printers in MacOS System Preferences exactly the same name - "AdobePDF.pc3" (without quotes).
You can add new printer or create a copy of the existing printer, or even rename one of the existing printers.
Now when you want to create Page Setup for the Layout, use this printer for it. If you will open such Layout in AutoCAD for Windows you will not get an alert.

Another way is to create two separate named page Setups for each layoutt-shirt one for PC and the other for Mac and switMac between this Layouts when you need.

About printer software for creating PDF in AutoCAD for Mac - in 2017 version you can use new printing system when you Batch Publish or export to PDF - it is exactly the same as in AutoCAD for Windows, even the names are the same.

Maxim