The time that your Mac displays is not only for your convenience, but also a requirement for many of OS X’s services. This includes its ability to schedule tasks and notify you of calendar events, as well as time-stamp files and events, and properly communicate with online services using some forms of encryption. Therefore, if the clock on your Mac is off, then you might not only be late for a meeting, but might also not be able to send or receive messages and other Web content. Continue reading ⇒