I want to determine from which server my application was downloaded, on its 
first use. (The app is hosted on many servers and I want to work out which one 
to connect back to.)

The Mac OS adds quarantine info to downloaded files. This is handled by Launch 
Services, so I can use LSCopyItemAttribute with kLSItemQuarantineProperties and 
look at the kLSQuarantineOriginURLKey value. However, the quarantine info is 
erased once the user has authorised the first use of the download. So I can 
read another file’s quarantine, but by the time my own app has launched, Launch 
Services has un-quarantined it and the info is gone.

Is there a way to access the quarantine info after launch? Or is there another 
way to determine where the downloaded app came from?

Thanks.

— Ben.




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