Hello Philip,
I could not make it work reliably.
As you might know already, Espionage works by storing the data into encrypted disk images.
After you added the folder to Espionage we move the data from the folder into encypted disk image and leave the original folder empty.
When you unlock the folder, we "mount" or attach, the content of the disk image to the folder you protected, and to you it looks as if the folder contains data, but it does not, you are just looking at the content of the disk image "through" the (empty) folder.
So this mount, or attach is happening locally on your mac.
Now, when you connect to a shared folder from another mac, this mount happens too, in this case you are "mounting" the remote mac folder onto your local mac to see the content.
Now, if you would like to look at the content of an unlocked folder on a remote mac, this means you are expecting to see the content of a disk image mounted on a remote mac, through a folder which is mounted on your local mac....does not look very reliable and promising.
So let's try to do something else.
Let's connect to the folder on the remote mac which contains the espionage disk images, and then you can import them to your local Espionage installation.
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All disk images of Espionage are by default located in the following folder
yourhomefolder/Library/Application Support/com.taoeffect.Espionage3/Data
to reach that folder, hold down the option key and select Library from the Finder's Go menu.
Once inside Library, you can navigate the other folder normally.
Make the folder com.taoeffect.Espionage3 on your MacBook shared
Now you should be able to connect to that folder from your iMac.
If it worked so far, let me know and I will tell you how to import the disk image from the MacBook into Espionage installation on the iMac.
Then, whenever you need to sync the folders, you simply unlock the Photography folder and your Archive folder, both on your iMac and copy the content between them.
Let me know your comments,
Zsolt