I don’t know about any system service where you can store some arbitrary information and then pick it up. In this section we will analyse in detail the last item from the previous list.įirst of all we must say that the information about trial period must be hidden somewhere in the filesystem. Moreover Macs use by default NTP (Network Time Protocol) daemon which synchronises the clock (it is convenient for normal user - it always displays the precise time). Yes, it may work, but please do not try it on unix (unix-like) system, this may lead to unexpected consequences. So one can think that it if he/she changes the current date in the computer, the application will think that the trial is not over. I assume that it simply takes current date and subtracts the start date. I leave aside the question, how the application computes the end of trial period. This case looks very appealing for a curious man who wonders: “How is it done”? So we will later explain some basic methods. In later runs it usually displays how many days still you can use it. When the application is run for the first time, a dialog appears with the information that the application is not registered and you have some time to try and explore it.
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