I also have those (and also don't know what they are), except I have two of com.apple.systemdefault and they have different years for expiry - 2028 and 2029.
My information doesn't help you get to an answer but it does let you know you're not alone in your perplexity.
ryck
Last edited by ryck; 09/16/11 11:22 AM.
ryck
"What Were Once Vices Are Now Habits" The Doobie Brothers
iMac (Retina 5K, 27", 2020), 3.8 GHz 8 Core Intel Core i7, 8GB RAM, 2667 MHz DDR4
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Canon Pixma TR 8520 Printer
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