Thanks to Best Buy's Cyber Monday sale, I just switched from an early-2011 MBP 15 to a late-2013 rMBP 13. Everything is great -- it is snappy, the screen is beautiful, etc. I've recently noticed, however, that the clock isn't able to keep accurate time. When I boot from cold, it is just fine, and stays just fine until the machine goes to sleep for any extended period (at least, I think that's what triggers it). When I wake it up, the clock is all jacked up, and won't pick up the correct time unless and until I open the System Preferences Date and Time pane. There doesn't seem to be any logic to the time it displays--it can be early, it can be late, it can be off by an hour (making it seem like a time zone thing) or several hours. In the Date and Time pane, I have the machine set to set time automatically, but not to set time zone automatically. I'm not running anything on this machine that I wasn't running on my old 15, which also ran Mavericks (if anything, I'm running less, having done away with AirDisplay, Parallels Access, gfxCardStatus, and TRIM Enabler). Any thoughts?