Thanks a lot to everybody for helping!
I have tried a number of approaches.
For the moment , I have settled for an app group container.
Both apps are members of the same app group container.
In that, app A creates a file with the flags, then launches app B, and B reads
the flags file (if present
Thanks a lot.
I tried this in my app A , but I keep getting the error message
launch path not accessible
together with a stack trace.
I am getting the url to my app B like this:
url_ = NSWorkspace.shared.urlForApplication( withBundleIdentifier:
"de.zach.AppB" )
which points to /priva