You can find where your save files are located here: https://priceforfreedom.net/avarice/faq/save_folder
Copying this folder between devices shouldn't pose problem.
Viewing post in Price for Freedom: Avarice comments
When you have many save files it becomes an inconvenient method and uses disk space as well vs one single file. I hope you'll seriously consider the export/import save file suggestion for future releases of this game, I know that many other games also include this function.
Btw, I have followed the mac instructions to locate the save files but no such directory or files exist? I've tried searching dir/files in finder, viewing hidden files enabled but still no luck. (I am operating the current macOS Monterey 12.3.1.)