find the apple id the user is currently login as?

[tranatisoc]

is it possible to determine if the user is logged in with an apple ID on their mac? and if so, how to find it? thx

[joshuasee]

The current MAS AppleID is in ~/Library/Preferences/com.apple.commerce.plist while the current iCloud AppleID is in ~/Library/Preferences/MobileMeAccounts.plist . Note the logged in AppleID need not be the same one a given MAS app was installed with.

See Any way to tell what Apple ID an app was installed under?