In the process of moving our app to sdk 10.12 we have also updated various app daemons to XPC Services. IT was the correct thing to do as the app is now more stable.
We are now encountering an issue and we are not understanding well how to solve it.
The XPC service we created will need to be enbedded in the main app and a couple of more Targets, Cocoa apps.
The issue at the moment is that for each Target that is running there is an independent instance of XPC Service launched.
What we are looking for is the ability to launch the various target using the same XPC Service instance.
I see an option in the XPC service plist to set either USER or APPLICATION
When we set for USER the issue seems to be the username or password access of the service to the keychain that is saved for the product bundle identifier name.
For example we have main app with com.company.MyApp and XPC Service com.company.MyApp.xpcservice
unless we are using Application with Join Session the xpc service does not work. Issue is that when we add a target com.company.MYapp.target and bundle the xpc service we change xpc service plist to USER witho join session option as we understnad you cant use it that way.
Does all this make sense ?
